1 files changed, 1 insertions, 1 deletions
diff --git a/src/library.js b/src/library.js
index d2b05764..8ec82c22 100644
--- a/src/library.js
+++ b/src/library.js
@@ -277,7 +277,7 @@ var Library = {
         }
       } else {
         Module.stdin = function stdin(prompt) {
-          return window.prompt(prompt);
+          return window.prompt(prompt) || '';
         };
       }