diff --git a/retropikzel/r7rs-pffi/r7rs-pffi-chibi.stub b/retropikzel/r7rs-pffi/r7rs-pffi-chibi.stub
index 91ece68..b7b50f2 100644
--- a/retropikzel/r7rs-pffi/r7rs-pffi-chibi.stub
+++ b/retropikzel/r7rs-pffi/r7rs-pffi-chibi.stub
@@ -256,6 +256,6 @@
     if(sexp_procedurep(proc) == 1) {
       puts(\"ITS A PROCEDURE\");
     }
-    return proc->source;
+    return proc->source; //FIXME
   }")
 (define-c void* (scheme-procedure-to-pointer scheme_procedure_to_pointer) (sexp))