diff --git a/cmd/zhack/zhack.c b/cmd/zhack/zhack.c
index a7da371c8a84..eedd17c30710 100644
--- a/cmd/zhack/zhack.c
+++ b/cmd/zhack/zhack.c
@@ -464,7 +464,7 @@ zhack_do_feature_ref(int argc, char **argv)
 	if (decr) {
 		uint64_t count;
 		if (feature_get_refcount_from_disk(spa, &feature,
-		    &count) == 0 && count != 0) {
+		    &count) == 0 && count == 0) {
 			fatal(spa, FTAG, "feature refcount already 0: %s",
 			    feature.fi_guid);
 		}