diff --git a/splat.js b/splat.js
index 08ff6f7..3c21a3b 100644
--- a/splat.js
+++ b/splat.js
@@ -19,7 +19,7 @@ const escapedPercent = /%%/g;
 
 class Splatter {
   constructor(opts) {
-    this.options = opts;
+    this.options = opts || {};
   }
 
   /**
@@ -69,6 +69,12 @@ class Splatter {
     }
 
     info.message = util.format(msg, ...splat);
+    if (this.options.source && this.options.arguments) {
+      const sourceMeta = {};
+      sourceMeta[this.options.source] = msg;
+      sourceMeta[this.options.arguments] = splat;
+      Object.assign(info, sourceMeta);
+    }
     return info;
   }