diff --git a/dll/win32/kernel32/client/proc.c b/dll/win32/kernel32/client/proc.c
index e107c19b029..3b7d6f05ec5 100644
--- a/dll/win32/kernel32/client/proc.c
+++ b/dll/win32/kernel32/client/proc.c
@@ -1658,7 +1658,7 @@ WINAPI
 GetPriorityClass(IN HANDLE hProcess)
 {
     NTSTATUS Status;
-    PROCESS_PRIORITY_CLASS PriorityClass;
+    PROCESS_PRIORITY_CLASS DECLSPEC_ALIGN(4) PriorityClass;
 
     /* Query the kernel */
     Status = NtQueryInformationProcess(hProcess,