diff --git a/dlls/hlink/hlink_private.h b/dlls/hlink/hlink_private.h
index e0ff09eaa78..33b58ac42f7 100644
--- a/dlls/hlink/hlink_private.h
+++ b/dlls/hlink/hlink_private.h
@@ -32,14 +32,14 @@
 extern HRESULT HLink_Constructor(IUnknown*,REFIID,void**) DECLSPEC_HIDDEN;
 extern HRESULT HLinkBrowseContext_Constructor(IUnknown*,REFIID,void**) DECLSPEC_HIDDEN;
 
-static inline void *heap_alloc(size_t len)
+static inline void* __WINE_ALLOC_SIZE(1) heap_alloc(size_t size)
 {
-    return HeapAlloc(GetProcessHeap(), 0, len);
+    return HeapAlloc(GetProcessHeap(), 0, size);
 }
 
-static inline void *heap_alloc_zero(size_t len)
+static inline void* __WINE_ALLOC_SIZE(1) heap_alloc_zero(size_t size)
 {
-    return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
+    return HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
 }
 
 static inline BOOL heap_free(void *mem)