diff --git a/lib/pure/dynlib.nim b/lib/pure/dynlib.nim
index 80fdc9dbca..8da422ffba 100644
--- a/lib/pure/dynlib.nim
+++ b/lib/pure/dynlib.nim
@@ -79,7 +79,8 @@ elif defined(windows) or defined(dos):
   # =======================================================================
   #
   type
-    THINSTANCE {.importc: "HINSTANCE".} = pointer
+    THINSTANCE {.importc: "HINSTANCE".} = object
+      x: pointer
 
   proc FreeLibrary(lib: THINSTANCE) {.importc, header: "<windows.h>", stdcall.}
   proc winLoadLibrary(path: cstring): THINSTANCE {.