diff --git a/bisect.c b/bisect.c
index e81c91d02c..83cb5b3a98 100644
--- a/bisect.c
+++ b/bisect.c
@@ -572,7 +572,7 @@ static int sqrti(int val)
 {
 	float d, x = val;
 
-	if (val == 0)
+	if (!val)
 		return 0;
 
 	do {
@@ -869,7 +869,7 @@ static void check_good_are_ancestors_of_bad(struct repository *r,
 		goto done;
 
 	/* Bisecting with no good rev is ok. */
-	if (good_revs.nr == 0)
+	if (!good_revs.nr)
 		goto done;
 
 	/* Check if all good revs are ancestor of the bad rev. */