diff --git a/avr/modules/heap/main.asm b/avr/modules/heap/main.asm
index a3938ac..3dfb7c6 100644
--- a/avr/modules/heap/main.asm
+++ b/avr/modules/heap/main.asm
@@ -244,10 +244,10 @@ Heap_Free:
       st X+, r24                        ; write chunk footer
       st X+, r25                        ; X points to the next chunk header now
       rcall heapAdjustStatsFree         ; update stats (r16, r17)
-      rcall heapCoalecseUp              ; try to coalecse following chunk with this (r16, r17, r24, r25, X)
+;      rcall heapCoalecseUp              ; try to coalecse following chunk with this (r16, r17, r24, r25, X)
     pop xh
   pop xl
-  rcall heapCoalecseUp                  ; try to coalesce this chunk with predecessor (r16, r17, r24, r25, X)
+;  rcall heapCoalecseUp                  ; try to coalesce this chunk with predecessor (r16, r17, r24, r25, X)
   rjmp Heap_Free_ret
 Heap_Free_dblFree:
   lds r24, heapDblFree