diff --git a/sdk/include/reactos/wine/winternl.h b/sdk/include/reactos/wine/winternl.h
index edd79e5..39f78ed 100644
--- a/sdk/include/reactos/wine/winternl.h
+++ b/sdk/include/reactos/wine/winternl.h
@@ -1319,7 +1319,11 @@ typedef struct _PROCESS_BASIC_INFORMATION {
 #define PROCESS_PRIOCLASS_BELOW_NORMAL  5
 #define PROCESS_PRIOCLASS_ABOVE_NORMAL  6
 
+#ifdef _REACTOS_ /* CORE-16757 we should try to get that into Wine too */
+typedef struct DECLSPEC_ALIGN(4) _PROCESS_PRIORITY_CLASS {
+#else
 typedef struct _PROCESS_PRIORITY_CLASS {
+#endif
     BOOLEAN     Foreground;
     UCHAR       PriorityClass;
 } PROCESS_PRIORITY_CLASS, *PPROCESS_PRIORITY_CLASS;