diff --git a/module/os/windows/zfs/sysctl_os.c b/module/os/windows/zfs/sysctl_os.c
index c671d5116ec2..ad665e5ad398 100644
--- a/module/os/windows/zfs/sysctl_os.c
+++ b/module/os/windows/zfs/sysctl_os.c
@@ -165,7 +165,7 @@ sysctl_os_process(PUNICODE_STRING pRegistryPath, ztunable_t *zt)
 
 		ZT_GET_VALUE(zt, &val, &len, &type);
 
-		ASSERT3P(val, != , NULL);
+		ASSERT3P(val, !=, NULL);
 
 		if (type == ZT_TYPE_STRING) {