diff --git a/lib/system/gc_common.nim b/lib/system/gc_common.nim
index ff2b6ad6a6..0466a58cdf 100644
--- a/lib/system/gc_common.nim
+++ b/lib/system/gc_common.nim
@@ -381,7 +381,6 @@ else:
             let regEnd = sp +% sizeof(registers)
             while sp <% regEnd:
               gcMark(gch, cast[PPointer](sp)[])
-              gcMark(gch, cast[PPointer](sp +% sizeof(pointer) div 2)[])
               sp = sp +% sizeof(pointer)
         # Make sure sp is word-aligned
         sp = sp and not (sizeof(pointer) - 1)