diff --git a/kernel/sys.c b/kernel/sys.c
index 0929c698affce76e1d48e52ca456b6c82298f928..f91218a5463e48e9716b3d14a4d54500477c6a6d 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -428,7 +428,7 @@ void kernel_kexec(void)
 {
 #ifdef CONFIG_KEXEC
 	struct kimage *image;
-	image = xchg(&kexec_image, 0);
+	image = xchg(&kexec_image, NULL);
 	if (!image) {
 		return;
 	}