diff --git a/dlls/kernel32/tests/thread.c b/dlls/kernel32/tests/thread.c
index a6c923dc063..b69f69fadaa 100644
--- a/dlls/kernel32/tests/thread.c
+++ b/dlls/kernel32/tests/thread.c
@@ -1840,7 +1840,7 @@ static inline unsigned long get_fpu_cw(void)
 #endif
     return MAKELONG( cw, sse );
 #elif defined(__aarch64__)
-    unsigned long cw;
+    ULONG_PTR cw;
     __asm__ __volatile__( "mrs %0, fpcr" : "=r" (cw) );
     return cw;
 #else