diff --git a/lib/system/mm/malloc.nim b/lib/system/mm/malloc.nim
index 47f1a95ae4..b3f81b5421 100644
--- a/lib/system/mm/malloc.nim
+++ b/lib/system/mm/malloc.nim
@@ -50,7 +50,7 @@ proc deallocSharedImpl(p: pointer) = deallocImpl(p)
 proc GC_disable() = discard
 proc GC_enable() = discard
 
-when not defined(gcOrc):
+when not defined(gcOrc) and not defined(gcYrc):
   proc GC_fullCollect() = discard
   proc GC_enableMarkAndSweep() = discard
   proc GC_disableMarkAndSweep() = discard