diff --git a/ReSharper.FSharp/src/FSharp/FSharp.Psi/src/Impl/Tree/AbstractMemberDeclaration.cs b/ReSharper.FSharp/src/FSharp/FSharp.Psi/src/Impl/Tree/AbstractMemberDeclaration.cs
index 21a164143c..47a2d55b65 100644
--- a/ReSharper.FSharp/src/FSharp/FSharp.Psi/src/Impl/Tree/AbstractMemberDeclaration.cs
+++ b/ReSharper.FSharp/src/FSharp/FSharp.Psi/src/Impl/Tree/AbstractMemberDeclaration.cs
@@ -8,6 +8,7 @@
 using JetBrains.ReSharper.Plugins.FSharp.Psi.Util;
 using JetBrains.ReSharper.Plugins.FSharp.Util;
 using JetBrains.ReSharper.Psi;
+using JetBrains.Util;
 
 namespace JetBrains.ReSharper.Plugins.FSharp.Psi.Impl.Tree
 {
@@ -36,23 +37,21 @@ public bool HasDefaultImplementation
 
     private static bool CalcHasDefaultImplementation([CanBeNull] FSharpMemberOrFunctionOrValue mfv)
     {
-      if (mfv is not {IsDispatchSlot: true})
+      if (mfv is not { IsDispatchSlot: true })
         return false;
 
-      var mfvEntity = mfv.DeclaringEntity;
+      var mfvEntity = mfv.DeclaringEntity?.Value;
       if (mfvEntity == null)
         return false;
 
       var logicalName = mfv.LogicalName;
-      var mfvType = mfv.FullType.GenericArguments[1];
 
-      return mfvEntity.Value.MembersFunctionsAndValues.Any(m =>
+      return mfvEntity.MembersFunctionsAndValues.Any(m =>
         m.IsOverrideOrExplicitInterfaceImplementation &&
         logicalName == m.LogicalName &&
-        (m.XmlDocSig == mfv.XmlDocSig && m.ImplementedAbstractSignatures.Count == 0 ||
-         mfvType.Equals(m.FullType) &&
-         m.ImplementedAbstractSignatures.Count == 1 &&
-         m.ImplementedAbstractSignatures[0].DeclaringType.Equals(mfvEntity.Value.AsType())));
+        m.XmlDocSig == mfv.XmlDocSig &&
+        m.ImplementedAbstractSignatures.SingleItem() is { DeclaringType: { HasTypeDefinition: true } declaringType } &&
+        declaringType.TypeDefinition.Equals(mfvEntity));
     }
 
     protected override string DeclaredElementName => NameIdentifier.GetCompiledName(Attributes);
diff --git a/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.cs b/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.cs
new file mode 100644
index 0000000000..53dc90cdf1
--- /dev/null
+++ b/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.cs	
@@ -0,0 +1,43 @@
+public class InheritAbstractClass : Module.AbstractClass;
+
+public class InheritAbstractClassOverrides : Module.AbstractClass
+{
+    public override void M1() => base.M1();
+    public override void M2(int i) => base.M2(i);
+    public override void M3<P1>(int i) => base.M3<P1>(i);
+    public override void M4<P1>(P1 p1) => base.M4(p1);
+    public override int P1 { get; }
+}
+
+public class InheritGenericAbstract : Module.GenericAbstractClass<int>;
+
+public class InheritGenericAbstractOverrides : Module.GenericAbstractClass<int>
+{
+    public override void M1() => base.M1();
+    public override void M2(int i) => base.M2(i);
+    public override void M3<P1>(int i) => base.M3<P1>(i);
+    public override void M4<P1>(P1 p1) => base.M4(p1);
+    public override void M5<P1>(P1 p1, int i) => base.M5<P1>(p1, i);
+    public override int P1 { get; }
+}
+
+public class InheritGeneric : Module.GenericClass<int>;
+
+public class InheritGenericOverrides : Module.GenericClass<int>
+{
+    public override void M() => base.M();
+    public override void M2(int i) => base.M2(i);
+    public override void M3<P1>(int i) => base.M3<P1>(i);
+    public override void M4(int i) => base.M4(i);
+    public override void M5<P1>(P1 p1, int i) => base.M5<P1>(p1, i);
+}
+
+public sealed class Counter;
+public sealed class CounterState;
+
+public class InheritGenericCommand2 : Module.GenericAbstractClass2<Counter, CounterState, bool, int>;
+
+public class InheritGenericCommand2Overrides : Module.GenericAbstractClass2<Counter, CounterState, bool, int>
+{
+    public override bool M(CounterState state, bool input) => base.M(state, input);
+}
diff --git a/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.fs b/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.fs
new file mode 100644
index 0000000000..7f88c774ba
--- /dev/null
+++ b/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.fs	
@@ -0,0 +1,59 @@
+module Module
+
+[<AbstractClass>]
+type AbstractClass() =
+    abstract member M1: unit -> unit
+    default this.M1() = ()
+
+    abstract member M2: int -> unit
+    default this.M2(i: int) = ()
+
+    abstract member M3<'P1>: int -> unit
+    default this.M3<'P1>(i: int) = ()
+
+    abstract member M4: 'P1 -> unit
+    default this.M4(p: 'P1) = ()
+
+    abstract member P1: int
+    default this.P1 = 1
+
+[<AbstractClass>]
+type GenericAbstractClass<'TOuter>() =
+    abstract member M1: unit -> unit
+    default this.M1() = ()
+
+    abstract member M2: int -> unit
+    default this.M2(i: int) = ()
+
+    abstract member M3<'P1>: int -> unit
+    default this.M3<'P1>(i: int) = ()
+
+    abstract member M4<'P1>: 'P1 -> unit
+    default this.M4<'P1>(i: 'P1) = ()
+
+    abstract member M5<'P1>: 'P1 * 'TOuter -> unit
+    default this.M5<'P1>(i1: 'P1, i2: 'TOuter) = ()
+
+    abstract member P1: 'TOuter
+    default this.P1 = Unchecked.defaultof<'TOuter>
+
+[<AbstractClass>]
+type GenericAbstractClass2<'TSystem, 'TState, 'TInput, 'TOutput>() =
+    abstract member M: state: 'TState * input: 'TInput -> bool
+    default this.M(_, _) = true
+
+type GenericClass<'TOuter>() =
+    abstract member M: unit -> unit
+    default this.M() = ()
+
+    abstract member M2: int -> unit
+    default this.M2(i: int) = ()
+    
+    abstract member M3<'P1>: int -> unit
+    default this.M3<'P1>(i: int) = ()
+
+    abstract member M4: 'TOuter -> unit
+    default this.M4(p: 'TOuter) = ()
+    
+    abstract member M5<'P1>: 'P1 * 'TOuter -> unit
+    default this.M5<'P1>(i1: 'P1, i2: 'TOuter) = ()
diff --git a/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.gold b/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.gold
new file mode 100644
index 0000000000..343dcd999b
--- /dev/null
+++ b/ReSharper.FSharp/test/data/cache/csharpResolve/Members 02 - Virtual.gold	
@@ -0,0 +1,75 @@
+public class InheritAbstractClass : Module.AbstractClass;
+
+public class InheritAbstractClassOverrides : Module.AbstractClass
+{
+    public override void M1() => base.M1();
+    public override void M2(int i) => base.M2(i);
+    public override void M3<P1>(int i) => base.M3<P1>(i);
+    public override void M4<P1>(P1 p1) => base.M4(p1);
+    public override int P1 { get; }
+}
+
+public class InheritGenericAbstract : Module.GenericAbstractClass<int>;
+
+public class InheritGenericAbstractOverrides : Module.GenericAbstractClass<int>
+{
+    public override void M1() => base.M1();
+    public override void M2(int i) => base.M2(i);
+    public override void M3<P1>(int i) => base.M3<P1>(i);
+    public override void M4<P1>(P1 p1) => base.M4(p1);
+    public override void M5<P1>(P1 p1, int i) => base.M5<P1>(p1, i);
+    public override int P1 { get; }
+}
+
+public class InheritGeneric : Module.GenericClass<int>;
+
+public class InheritGenericOverrides : Module.GenericClass<int>
+{
+    public override void M() => base.M();
+    public override void M2(int i) => base.M2(i);
+    public override void M3<P1>(int i) => base.M3<P1>(i);
+    public override void M4(int i) => base.M4(i);
+    public override void M5<P1>(P1 p1, int i) => base.M5<P1>(p1, i);
+}
+
+public sealed class Counter;
+public sealed class CounterState;
+
+public class InheritGenericCommand2 : Module.GenericAbstractClass2<Counter, CounterState, bool, int>;
+
+public class InheritGenericCommand2Overrides : Module.GenericAbstractClass2<Counter, CounterState, bool, int>
+{
+    public override bool M(CounterState state, bool input) => base.M(state, input);
+}
+
+---------------------------------------------------------
+M:Module.AbstractClass.M1
+M:Module.AbstractClass.M1
+M:Module.AbstractClass.M2(System.Int32)
+M:Module.AbstractClass.M2(System.Int32)
+M:Module.AbstractClass.M3``1(System.Int32)
+M:Module.AbstractClass.M3``1(System.Int32)
+M:Module.AbstractClass.M4``1(`0)
+M:Module.AbstractClass.M4``1(`0)
+M:Module.GenericAbstractClass`1.M1
+M:Module.GenericAbstractClass`1.M1
+M:Module.GenericAbstractClass`1.M2(System.Int32)
+M:Module.GenericAbstractClass`1.M2(System.Int32)
+M:Module.GenericAbstractClass`1.M3``1(System.Int32)
+M:Module.GenericAbstractClass`1.M3``1(System.Int32)
+M:Module.GenericAbstractClass`1.M4``1(`0)
+M:Module.GenericAbstractClass`1.M4``1(`0)
+M:Module.GenericAbstractClass`1.M5``1(`0,`0)
+M:Module.GenericAbstractClass`1.M5``1(`0,`0)
+M:Module.GenericClass`1.M
+M:Module.GenericClass`1.M
+M:Module.GenericClass`1.M2(System.Int32)
+M:Module.GenericClass`1.M2(System.Int32)
+M:Module.GenericClass`1.M3``1(System.Int32)
+M:Module.GenericClass`1.M3``1(System.Int32)
+M:Module.GenericClass`1.M4(`0)
+M:Module.GenericClass`1.M4(`0)
+M:Module.GenericClass`1.M5``1(`0,`0)
+M:Module.GenericClass`1.M5``1(`0,`0)
+M:Module.GenericAbstractClass2`4.M(`1,`2)
+M:Module.GenericAbstractClass2`4.M(`1,`2)
diff --git a/ReSharper.FSharp/test/src/FSharp.Tests/Cache/CSharpResolveTest.fs b/ReSharper.FSharp/test/src/FSharp.Tests/Cache/CSharpResolveTest.fs
index 00ca5b7c3f..84af3c4f2f 100644
--- a/ReSharper.FSharp/test/src/FSharp.Tests/Cache/CSharpResolveTest.fs
+++ b/ReSharper.FSharp/test/src/FSharp.Tests/Cache/CSharpResolveTest.fs
@@ -74,6 +74,7 @@ type CSharpResolveTest() =
     [<Test>] member x.``Auto properties 02, compiled name``() = x.DoNamedTest()
 
     [<Test>] member x.``Members 01 - Virtual``() = x.DoNamedTest()
+    [<Test>] member x.``Members 02 - Virtual``() = x.DoNamedTest()
 
     [<Test>] member x.``Methods 01``() = x.DoNamedTest()
     [<Test>] member x.``Methods 02, compiled name``() = x.DoNamedTest()