diff --git a/dlls/shcore/shcore.spec b/dlls/shcore/shcore.spec
index 4c2717948de..6a634bdee5c 100644
--- a/dlls/shcore/shcore.spec
+++ b/dlls/shcore/shcore.spec
@@ -20,7 +20,7 @@
 @ stdcall IStream_Size(ptr ptr)
 @ stdcall IStream_Write(ptr ptr long) _IStream_Write
 @ stub IStream_WriteStr
-@ stdcall IUnknown_AtomicRelease(long)
+@ stdcall IUnknown_AtomicRelease(ptr)
 @ stdcall IUnknown_GetSite(ptr ptr ptr)
 @ stdcall IUnknown_QueryService(ptr ptr ptr ptr)
 @ stdcall IUnknown_Set(ptr ptr)