diff --git a/compiler/src/prog8/ast/AST.kt b/compiler/src/prog8/ast/AST.kt
index 903e9e38b..26246768a 100644
--- a/compiler/src/prog8/ast/AST.kt
+++ b/compiler/src/prog8/ast/AST.kt
@@ -1584,7 +1584,7 @@ class AnonymousScope(override var statements: MutableList<IStatement>,
     override lateinit var parent: Node
 
     init {
-        name = "<<<anonymous-$sequenceNumber>>>"
+        name = "<anon-$sequenceNumber>"     // make sure it's an invalid soruce code identifier so user source code can never produce it
         sequenceNumber++
     }
 
diff --git a/compiler/src/prog8/compiler/target/c64/AsmGen.kt b/compiler/src/prog8/compiler/target/c64/AsmGen.kt
index 109fc4a91..e6e0b0ec9 100644
--- a/compiler/src/prog8/compiler/target/c64/AsmGen.kt
+++ b/compiler/src/prog8/compiler/target/c64/AsmGen.kt
@@ -25,7 +25,7 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
     init {
         // Because 64tass understands scoped names via .proc / .block,
         // we'll strip the block prefix from all scoped names in the program.
-        // Also, convert invalid label names (such as "<<<anonymous-1>>>") to something that's allowed.
+        // Also, convert invalid label names (such as "<anon-1>") to something that's allowed.
         // Also have to do that for the variablesMarkedForZeropage!
         val newblocks = mutableListOf<IntermediateProgram.ProgramBlock>()
         for(block in program.blocks) {
@@ -128,7 +128,7 @@ class AsmGen(val options: CompilationOptions, val program: IntermediateProgram,
                 scoped
             }
         }
-        name = name.replace("<<<", "prog8_").replace(">>>", "")
+        name = name.replace("<", "prog8_").replace(">", "")     // take care of the autogenerated invalid (anon) label names
         if(name=="-")
             return "-"
         if(blockLocal)