diff --git a/imagemagick.js b/imagemagick.js
index b846c0c..fbaf99e 100644
--- a/imagemagick.js
+++ b/imagemagick.js
@@ -110,6 +110,7 @@ function parseIdentify(input) {
 
   for (i in lines) {
     currentLine = lines[i];
+    if(typeof currentLine != 'string') continue;
     indent = currentLine.search(/\S/);
     if (indent >= 0) {
       comps = currentLine.split(': ');