diff --git a/src/source/geojson_worker_source.js b/src/source/geojson_worker_source.js
index 5add854fd0e..00fc790efa8 100644
--- a/src/source/geojson_worker_source.js
+++ b/src/source/geojson_worker_source.js
@@ -167,7 +167,7 @@ class GeoJSONWorkerSource extends VectorTileWorkerSource {
             if (err || !data) {
                 return callback(err);
             } else if (typeof data !== 'object') {
-                return callback(new Error("Input data is not a valid GeoJSON object."));
+                return callback(new Error(`Input data given to '${params.source}' is not a valid GeoJSON object.`));
             } else {
                 rewind(data, true);
 
@@ -267,10 +267,10 @@ class GeoJSONWorkerSource extends VectorTileWorkerSource {
             try {
                 return callback(null, JSON.parse(params.data));
             } catch (e) {
-                return callback(new Error("Input data is not a valid GeoJSON object."));
+                return callback(new Error(`Input data given to '${params.source}' is not a valid GeoJSON object.`));
             }
         } else {
-            return callback(new Error("Input data is not a valid GeoJSON object."));
+            return callback(new Error(`Input data given to '${params.source}' is not a valid GeoJSON object.`));
         }
     }