diff --git a/src/main/scala/org/camunda/feel/impl/builtin/ListBuiltinFunctions.scala b/src/main/scala/org/camunda/feel/impl/builtin/ListBuiltinFunctions.scala
index dea911e08..3e8c54de3 100644
--- a/src/main/scala/org/camunda/feel/impl/builtin/ListBuiltinFunctions.scala
+++ b/src/main/scala/org/camunda/feel/impl/builtin/ListBuiltinFunctions.scala
@@ -513,8 +513,9 @@ class ListBuiltinFunctions(private val valueMapper: ValueMapper) {
   private def emptyFunction =
     builtinFunction(
       params = List("list"),
-      invoke = { case List(ValList(list)) =>
-        ValBoolean(list.isEmpty)
+      invoke = {
+        case List(ValString(list)) => ValBoolean(list.isEmpty)
+        case List(ValList(list)) => ValBoolean(list.isEmpty)
       }
     )
 
diff --git a/src/test/scala/org/camunda/feel/impl/builtin/BuiltinListFunctionsTest.scala b/src/test/scala/org/camunda/feel/impl/builtin/BuiltinListFunctionsTest.scala
index a2a80c0b7..4736b6cbe 100644
--- a/src/test/scala/org/camunda/feel/impl/builtin/BuiltinListFunctionsTest.scala
+++ b/src/test/scala/org/camunda/feel/impl/builtin/BuiltinListFunctionsTest.scala
@@ -563,11 +563,31 @@ class BuiltinListFunctionsTest
     evaluateExpression(""" string join(["foo", 123, "bar"]) """) should returnNull()
   }
 
-  "A list is empty() function" should "return if the list is empty" in {
+  "A list or string is empty() function" should "return Boolean" in {
 
     evaluateExpression(" is empty([]) ") should returnResult(true)
     evaluateExpression(" is empty([1]) ") should returnResult(false)
     evaluateExpression(" is empty([1,2,3]) ") should returnResult(false)
     evaluateExpression(" is empty(list: [1]) ") should returnResult(false)
+
+    evaluateExpression(
+      expression = """ is empty("") """
+    ) should returnResult(true)
+
+    evaluateExpression(
+      expression = """ is empty(" ") """
+    ) should returnResult(false)
+
+    evaluateExpression(
+      expression = """ is empty("hello world") """
+    ) should returnResult(false)
+
+    evaluateExpression(
+      expression = """ is empty(" hello world ") """
+    ) should returnResult(false)
+
+    evaluateExpression(
+      expression = """ is empty("\t\n\r\f") """
+    ) should returnResult(false)
   }
 }