diff --git a/src/blocks/scratch3_operators.js b/src/blocks/scratch3_operators.js
index a2a5ab4bd2b..4a86e4738b9 100644
--- a/src/blocks/scratch3_operators.js
+++ b/src/blocks/scratch3_operators.js
@@ -33,10 +33,15 @@ class Scratch3OperatorsBlocks {
             operator_contains: this.contains,
             operator_mod: this.mod,
             operator_round: this.round,
-            operator_mathop: this.mathop
+            operator_mathop: this.mathop,
+            checkbox: this.checkbox
         };
     }
 
+    checkbox () {
+      return true;
+    }
+
     add (args) {
         return Cast.toNumber(args.NUM1) + Cast.toNumber(args.NUM2);
     }
diff --git a/src/compiler/irgen.js b/src/compiler/irgen.js
index 4c3137939a9..c2724f4685d 100644
--- a/src/compiler/irgen.js
+++ b/src/compiler/irgen.js
@@ -177,6 +177,11 @@ class ScriptTreeGenerator {
                 kind: 'constant',
                 value: block.fields.TEXT.value
             };
+        case 'checkbox':
+            return {
+                kind: 'constant',
+                value: true
+            };
 
         case 'argument_reporter_string_number': {
             const name = block.fields.VALUE.value;