diff --git a/modules/indexer/issues/bleve/bleve.go b/modules/indexer/issues/bleve/bleve.go
index bf51bd6c14..8d2c4f3495 100644
--- a/modules/indexer/issues/bleve/bleve.go
+++ b/modules/indexer/issues/bleve/bleve.go
@@ -9,6 +9,7 @@ import (
 	indexer_internal "code.gitea.io/gitea/modules/indexer/internal"
 	inner_bleve "code.gitea.io/gitea/modules/indexer/internal/bleve"
 	"code.gitea.io/gitea/modules/indexer/issues/internal"
+	"code.gitea.io/gitea/modules/optional"
 
 	"github.com/blevesearch/bleve/v2"
 	"github.com/blevesearch/bleve/v2/analysis/analyzer/custom"
@@ -236,7 +237,9 @@ func (b *Indexer) Search(ctx context.Context, options *internal.SearchOptions) (
 		queries = append(queries, inner_bleve.NumericEqualityQuery(options.PosterID.Value(), "poster_id"))
 	}
 
-	if options.AssigneeID.Has() {
+	if options.AnyAssigneeOnly {
+		queries = append(queries, inner_bleve.NumericRangeInclusiveQuery(optional.Some[int64](1), optional.None[int64](), "assignee_id"))
+	} else if options.AssigneeID.Has() {
 		queries = append(queries, inner_bleve.NumericEqualityQuery(options.AssigneeID.Value(), "assignee_id"))
 	}
 
diff --git a/modules/indexer/issues/internal/tests/tests.go b/modules/indexer/issues/internal/tests/tests.go
index 0483853dfd..af23ec4e46 100644
--- a/modules/indexer/issues/internal/tests/tests.go
+++ b/modules/indexer/issues/internal/tests/tests.go
@@ -647,6 +647,21 @@ var cases = []*testIndexerCase{
 			}
 		},
 	},
+	{
+		Name: "SearchAnyAssignee",
+		SearchOptions: &internal.SearchOptions{
+			AnyAssigneeOnly: true,
+		},
+		Expected: func(t *testing.T, data map[int64]*internal.IndexerData, result *internal.SearchResult) {
+			assert.Len(t, result.Hits, 180)
+			for _, v := range result.Hits {
+				assert.GreaterOrEqual(t, data[v.ID].AssigneeID, int64(1))
+			}
+			assert.Equal(t, countIndexerData(data, func(v *internal.IndexerData) bool {
+				return v.AssigneeID >= 1
+			}), result.Total)
+		},
+	},
 }
 
 type testIndexerCase struct {