diff --git a/AUTHORS b/AUTHORS
index 073b632..dc45531 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -11,6 +11,7 @@ alphabetical order):
 - Jamie Starke
 - @jdn06
 - Jonas Kaufmann
+- Jorge Gallegos
 - Juan A. Suarez Romero
 - Kai Fricke
 - Keith Johnson
diff --git a/sigal/image.py b/sigal/image.py
index 1388e23..a7eb202 100644
--- a/sigal/image.py
+++ b/sigal/image.py
@@ -270,7 +270,7 @@ def get_exif_tags(data):
         else:
             logger.info('Unknown format for ExposureTime: %r', exptime)
 
-    if 'ISOSpeedRatings' in data and data['ISOSpeedRatings']:
+    if data.get('ISOSpeedRatings'):
         if isinstance(data['ISOSpeedRatings'], tuple):
             # Pillow == 3.0
             simple['iso'] = data['ISOSpeedRatings'][0]