1 files changed, 3 insertions, 2 deletions
diff --git a/js/ui/keys.js b/js/ui/keys.js
index 6dc013f..ba63fa7 100644
--- a/js/ui/keys.js
+++ b/js/ui/keys.js
@@ -178,8 +178,9 @@ var keys = (function(){
   }
   keys.multi_numeral_blur = function (lex, fn){
     return function(){
-      var current = parseInt(lex.char)
-      fn(current)
+      var n = parseInt(lex.char)
+      if (isNaN(n)) return
+      fn(n)
     }
   }