diff --git a/routers/api/v1/repo/repo.go b/routers/api/v1/repo/repo.go
index 5fe41927f..4afe1661d 100644
--- a/routers/api/v1/repo/repo.go
+++ b/routers/api/v1/repo/repo.go
@@ -51,6 +51,10 @@ func Search(ctx *context.APIContext) {
 	//   in: query
 	//   description: keyword
 	//   type: string
+	// - name: topic
+	//   in: query
+	//   description: Limit search to repositories with keyword as topic
+	//   type: boolean
 	// - name: uid
 	//   in: query
 	//   description: search only for repos that the user with the given id owns or contributes to
diff --git a/templates/swagger/v1_json.tmpl b/templates/swagger/v1_json.tmpl
index 2d5f8c5c9..ee0534569 100644
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@@ -1093,6 +1093,12 @@
             "name": "q",
             "in": "query"
           },
+          {
+            "type": "boolean",
+            "description": "Limit search to repositories with keyword as topic",
+            "name": "topic",
+            "in": "query"
+          },
           {
             "type": "integer",
             "format": "int64",