diff --git a/dll/win32/advapi32/wine/ros_diff.patch b/dll/win32/advapi32/wine/ros_diff.patch
deleted file mode 100644
index a6c0c08c138..00000000000
--- a/dll/win32/advapi32/wine/ros_diff.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-Index: crypt.c
-===================================================================
---- crypt.c	(Revision 48087)
-+++ crypt.c	(Arbeitskopie)
-@@ -618,7 +618,7 @@
-  *  Success: TRUE
-  *  Failure: FALSE
-  */
--BOOL WINAPI CryptReleaseContext (HCRYPTPROV hProv, ULONG_PTR dwFlags)
-+BOOL WINAPI CryptReleaseContext (HCRYPTPROV hProv, DWORD dwFlags)
- {
- 	PCRYPTPROV pProv = (PCRYPTPROV)hProv;
- 	BOOL ret = TRUE;