diff --git a/revision.c b/revision.c
index ccbe2e03d1..087d64d572 100644
--- a/revision.c
+++ b/revision.c
@@ -752,6 +752,9 @@ static int check_maybe_different_in_bloom_filter(struct rev_info *revs,
 	struct bloom_filter *filter;
 	int result = 0;
 
+	if (!revs->bloom_keyvecs_nr)
+		return -1;
+
 	if (commit_graph_generation(commit) == GENERATION_NUMBER_INFINITY)
 		return -1;
 
@@ -806,7 +809,7 @@ static int rev_compare_tree(struct rev_info *revs,
 			return REV_TREE_SAME;
 	}
 
-	if (revs->bloom_keyvecs_nr && !nth_parent) {
+	if (!nth_parent) {
 		bloom_ret = check_maybe_different_in_bloom_filter(revs, commit);
 
 		if (bloom_ret == 0)
@@ -833,7 +836,7 @@ static int rev_same_tree_as_empty(struct rev_info *revs, struct commit *commit,
 	if (!t1)
 		return 0;
 
-	if (!nth_parent && revs->bloom_keyvecs_nr) {
+	if (!nth_parent) {
 		bloom_ret = check_maybe_different_in_bloom_filter(revs, commit);
 		if (!bloom_ret)
 			return 1;