diff --git a/src/os_win32.c b/src/os_win32.c
index 9d4ae0b..421a164 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -489,15 +489,15 @@
  * These are needed to dynamically load the ADVAPI DLL, which is not
  * implemented under Windows 95 (and causes VIM to crash)
  */
-typedef DWORD (WINAPI *PSNSECINFO) (LPSTR, enum SE_OBJECT_TYPE,
+typedef DWORD (WINAPI *PSNSECINFO) (LPSTR, SE_OBJECT_TYPE,
 	SECURITY_INFORMATION, PSID, PSID, PACL, PACL);
-typedef DWORD (WINAPI *PGNSECINFO) (LPSTR, enum SE_OBJECT_TYPE,
+typedef DWORD (WINAPI *PGNSECINFO) (LPSTR, SE_OBJECT_TYPE,
 	SECURITY_INFORMATION, PSID *, PSID *, PACL *, PACL *,
 	PSECURITY_DESCRIPTOR *);
 # ifdef FEAT_MBYTE
-typedef DWORD (WINAPI *PSNSECINFOW) (LPWSTR, enum SE_OBJECT_TYPE,
+typedef DWORD (WINAPI *PSNSECINFOW) (LPWSTR, SE_OBJECT_TYPE,
 	SECURITY_INFORMATION, PSID, PSID, PACL, PACL);
-typedef DWORD (WINAPI *PGNSECINFOW) (LPWSTR, enum SE_OBJECT_TYPE,
+typedef DWORD (WINAPI *PGNSECINFOW) (LPWSTR, SE_OBJECT_TYPE,
 	SECURITY_INFORMATION, PSID *, PSID *, PACL *, PACL *,
 	PSECURITY_DESCRIPTOR *);
 # endif