diff --git a/rest-api-spec/api/cluster.get_settings.json b/rest-api-spec/api/cluster.get_settings.json
index 31290b7385e..45f2a7f1ae2 100644
--- a/rest-api-spec/api/cluster.get_settings.json
+++ b/rest-api-spec/api/cluster.get_settings.json
@@ -10,6 +10,14 @@
         "flat_settings": {
           "type": "boolean",
           "description": "Return settings in flat format (default: false)"
+        },
+        "master_timeout": {
+          "type" : "time",
+          "description" : "Explicit operation timeout for connection to master node"
+        },
+        "timeout": {
+          "type" : "time",
+          "description" : "Explicit operation timeout"
         }
       }
     },
diff --git a/rest-api-spec/api/cluster.reroute.json b/rest-api-spec/api/cluster.reroute.json
index e9bdf2f90af..3ec95f1a0a2 100644
--- a/rest-api-spec/api/cluster.reroute.json
+++ b/rest-api-spec/api/cluster.reroute.json
@@ -15,6 +15,14 @@
         "filter_metadata": {
           "type" : "boolean",
           "description" : "Don't return cluster state metadata (default: false)"
+        },
+        "master_timeout": {
+          "type" : "time",
+          "description" : "Explicit operation timeout for connection to master node"
+        },
+        "timeout": {
+          "type" : "time",
+          "description" : "Explicit operation timeout"
         }
       }
     },