diff --git a/patches/directmanipulation-new-dll/0012-directmanipulation-tests-Initial-tests.patch b/patches/directmanipulation-new-dll/0012-directmanipulation-tests-Initial-tests.patch
index 187cb8b6..23f41b34 100644
--- a/patches/directmanipulation-new-dll/0012-directmanipulation-tests-Initial-tests.patch
+++ b/patches/directmanipulation-new-dll/0012-directmanipulation-tests-Initial-tests.patch
@@ -81,7 +81,7 @@ index 0000000000..9ecc3d54be
 +
 +#include "wine/test.h"
 +
-+static void test_IDirectManipulationManager2()
++static void test_IDirectManipulationManager2(void)
 +{
 +    IDirectManipulationManager2 *manager2;
 +    IDirectManipulationUpdateManager *update;