diff --git a/getimageinfo.py b/getimageinfo.py
index c9741f8..ba72d23 100644
--- a/getimageinfo.py
+++ b/getimageinfo.py
@@ -41,6 +41,8 @@ def getImageInfo(data):
         jpeg.read(2)
         b = jpeg.read(1)
         try:
+            h = 0
+            w = 0
             while (b and ord(b) != 0xDA):
                 while (ord(b) != 0xFF): b = jpeg.read(1)
                 while (ord(b) == 0xFF): b = jpeg.read(1)
@@ -58,4 +60,4 @@ def getImageInfo(data):
         except ValueError:
             pass
 
-    return content_type, width, height
\ No newline at end of file
+    return content_type, width, height