diff --git a/dlls/dswave/dswave_main.c b/dlls/dswave/dswave_main.c
index b02f3720d0e..f01e1705afd 100644
--- a/dlls/dswave/dswave_main.c
+++ b/dlls/dswave/dswave_main.c
@@ -375,7 +375,7 @@ const char *debugstr_dmguid (const GUID *id) {
 
         if (!id) return "(null)";
 
-	for (i = 0; i < sizeof(guids)/sizeof(guids[0]); i++) {
+	for (i = 0; i < ARRAY_SIZE(guids); i++) {
 		if (IsEqualGUID(id, guids[i].guid))
 			return guids[i].name;
 	}
@@ -419,7 +419,7 @@ static const char *debugstr_DMUS_OBJ_FLAGS (DWORD flagmask) {
 	    FE(DMUS_OBJ_MEMORY),
 	    FE(DMUS_OBJ_STREAM)
 	};
-    return debugstr_flags (flagmask, flags, sizeof(flags)/sizeof(flags[0]));
+    return debugstr_flags(flagmask, flags, ARRAY_SIZE(flags));
 }
 
 /* dump whole DMUS_OBJECTDESC struct */