diff --git a/lib/system/gc_ms.nim b/lib/system/gc_ms.nim
index c764571b1b..ec69f6e5fe 100644
--- a/lib/system/gc_ms.nim
+++ b/lib/system/gc_ms.nim
@@ -28,6 +28,9 @@ template mulThreshold(x): expr {.immediate.} = x * 2
 
 when defined(memProfiler):
   proc nimProfile(requestedSize: int)
+  
+when hasThreadSupport:
+  import sharedlist
 
 type
   WalkOp = enum