diff --git a/dlls/wmp/tests/media.c b/dlls/wmp/tests/media.c
index 3fd74ad75aa..218b80f1e67 100644
--- a/dlls/wmp/tests/media.c
+++ b/dlls/wmp/tests/media.c
@@ -77,7 +77,7 @@ static inline WCHAR *load_resource(const WCHAR *name)
     HRSRC res;
     void *ptr;
 
-    GetTempPathW(sizeof(pathW)/sizeof(WCHAR), pathW);
+    GetTempPathW(ARRAY_SIZE(pathW), pathW);
     lstrcatW(pathW, name);
 
     file = CreateFileW(pathW, GENERIC_READ|GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, 0);
diff --git a/dlls/wmp/tests/oleobj.c b/dlls/wmp/tests/oleobj.c
index 41179dae5d7..6dfaa1c9e1d 100644
--- a/dlls/wmp/tests/oleobj.c
+++ b/dlls/wmp/tests/oleobj.c
@@ -79,7 +79,7 @@ static inline WCHAR *load_resource(const WCHAR *name)
     HRSRC res;
     void *ptr;
 
-    GetTempPathW(sizeof(pathW)/sizeof(WCHAR), pathW);
+    GetTempPathW(ARRAY_SIZE(pathW), pathW);
     lstrcatW(pathW, name);
 
     file = CreateFileW(pathW, GENERIC_READ|GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, 0);