diff --git a/mingw-w64-headers/ddk/include/ddk/wdm.h b/mingw-w64-headers/ddk/include/ddk/wdm.h
index f54e0a1..e80c9b1 100644
--- a/mingw-w64-headers/ddk/include/ddk/wdm.h
+++ b/mingw-w64-headers/ddk/include/ddk/wdm.h
@@ -1366,9 +1366,8 @@
 
 #define KTIMER_ACTUAL_LENGTH (FIELD_OFFSET(KTIMER, Period) + sizeof(LONG))
 
-typedef BOOLEAN
-(NTAPI *PKSYNCHRONIZE_ROUTINE)(
-  IN PVOID SynchronizeContext);
+typedef BOOLEAN (NTAPI KSYNCHRONIZE_ROUTINE)(PVOID SynchronizeContext);
+typedef KSYNCHRONIZE_ROUTINE *PKSYNCHRONIZE_ROUTINE;
 
 typedef enum _POOL_TYPE {
   NonPagedPool,