diff --git a/lib/pure/os.nim b/lib/pure/os.nim
index d2e112c189..82d6177e11 100644
--- a/lib/pure/os.nim
+++ b/lib/pure/os.nim
@@ -1121,8 +1121,8 @@ when defined(windows):
 
 else:
   const
-    useNSGetEnviron = defined(macosx) and
-      (defined(createNimRtl) or defined(useNimRtl))
+    useNSGetEnviron = defined(macosx)
+
   when useNSGetEnviron:
     # From the manual:
     # Shared libraries and bundles don't have direct access to environ,