diff --git a/src/actions.cpp b/src/actions.cpp
index 96a977fc..2b9d7a3e 100644
--- a/src/actions.cpp
+++ b/src/actions.cpp
@@ -329,7 +329,7 @@ namespace Action {
             done = 0 != printTag(exifData, "Exif.Photo.ISOSpeedRatings");
         }
         if (!done) {
-            done = 0 != printTag(exifData, "Exif.CanonCs1.ISOSpeed");
+            done = 0 != printTag(exifData, "Exif.CanonCs2.ISOSpeed");
         }
         if (!done) {
             done = 0 != printTag(exifData, "Exif.Nikon1.ISOSpeed");