diff --git a/lib/system.nim b/lib/system.nim
index 64a70b61bc..f3e7c525a4 100755
--- a/lib/system.nim
+++ b/lib/system.nim
@@ -1935,6 +1935,7 @@ when not defined(EcmaScript) and not defined(NimrodVM):
     include "system/syslocks"
     include "system/threads"
   elif not defined(nogc):
+    when not defined(useNimRtl) and not defined(createNimRtl): initStackBottom()
     initGC()
 
   proc setControlCHook*(hook: proc () {.noconv.})
diff --git a/lib/system/threads.nim b/lib/system/threads.nim
index 6b1fd21783..87411c9355 100755
--- a/lib/system/threads.nim
+++ b/lib/system/threads.nim
@@ -203,6 +203,7 @@ when not defined(useNimRtl):
   when not useStackMaskHack:
     var mainThread: TGcThread
     ThreadVarSetValue(globalsSlot, addr(mainThread))
+    when not defined(createNimRtl): initStackBottom()
     initGC()
     
   when emulatedThreadVars: