diff --git a/models/issues/issue_search.go b/models/issues/issue_search.go
index 9b6bf117b1f..0bea1fed143 100644
--- a/models/issues/issue_search.go
+++ b/models/issues/issue_search.go
@@ -186,7 +186,7 @@ func applyProjectBoardCondition(sess *xorm.Session, opts *IssuesOptions) *xorm.S
 	if opts.ProjectBoardID > 0 {
 		sess.In("issue.id", builder.Select("issue_id").From("project_issue").Where(builder.Eq{"project_board_id": opts.ProjectBoardID}))
 	} else if opts.ProjectBoardID == db.NoConditionID {
-		sess.In("issue.id", builder.Select("issue_id").From("project_issue").Where(builder.Neq{"project_board_id": 0}))
+		sess.In("issue.id", builder.Select("issue_id").From("project_issue").Where(builder.Eq{"project_board_id": 0}))
 	}
 	return sess
 }
diff --git a/modules/indexer/issues/indexer_test.go b/modules/indexer/issues/indexer_test.go
index 0ec23164c28..da4fc9b8789 100644
--- a/modules/indexer/issues/indexer_test.go
+++ b/modules/indexer/issues/indexer_test.go
@@ -382,6 +382,12 @@ func searchIssueInProject(t *testing.T) {
 			},
 			[]int64{1},
 		},
+		{
+			SearchOptions{
+				ProjectBoardID: int64Pointer(0), // issue with in default board
+			},
+			[]int64{2},
+		},
 	}
 	for _, test := range tests {
 		issueIDs, _, err := SearchIssues(context.TODO(), &test.opts)