diff --git a/compiler/src/prog8/optimizer/StatementOptimizer.kt b/compiler/src/prog8/optimizer/StatementOptimizer.kt
index e2c1b4722..d8d1954db 100644
--- a/compiler/src/prog8/optimizer/StatementOptimizer.kt
+++ b/compiler/src/prog8/optimizer/StatementOptimizer.kt
@@ -53,7 +53,8 @@ internal class StatementOptimizer(private val program: Program,
         }
 
         if(subroutine !in callgraph.usedSymbols && !forceOutput) {
-            errors.warn("removing unused subroutine '${subroutine.name}'", subroutine.position)
+            if(!subroutine.isAsmSubroutine)
+                errors.warn("removing unused subroutine '${subroutine.name}'", subroutine.position)
             return listOf(IAstModification.Remove(subroutine, subroutine.definingScope()))
         }
 
diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index 350a7a582..ca58b875d 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -2,6 +2,7 @@
 TODO
 ====
 
+- don't require carry parameter Pc to asmsubs to be last; sort this out yourself like with the R0-R15 registers
 - make blocks without explicit memory address, word-aligned in the assembly.
 - add sound to the cx16 tehtriz
 - hoist all variable declarations up to the subroutine scope *before* even the constant folding takes place (to avoid undefined symbol errors when referring to a variable from another nested scope in the subroutine)