1 files changed, 3 insertions, 4 deletions
diff --git a/lib/prompts.js b/lib/prompts.js
index 779ef8d..bf37818 100644
--- a/lib/prompts.js
+++ b/lib/prompts.js
@@ -36,7 +36,7 @@ exports.prompt = function prompt(prompt, defaultValue) {
     if (result) {
         return stringValue.value;
     } else {
-        return undefined;
+        return null;
     }
 };
 
@@ -65,7 +65,7 @@ exports.promptPassword = function promptPassword(prompt) {
     if (result) {
         return password.value ? password.value : null;
     } else {
-        return undefined;
+        return null;
     }
 };
 
@@ -75,8 +75,7 @@ exports.promptPassword = function promptPassword(prompt) {
  */
 exports.promptYesNoCancel = function promptOKNoCancel(prompt) {
     if (!prompt) { // either undefined or null
-        console.error("Prompt is required!");
-        return undefined;
+        throw new Error("Prompt is required!");
     }
     var prompts = Cc["@mozilla.org/embedcomp/prompt-service;1"]
             .getService(Ci.nsIPromptService);