diff --git a/lib/paperclip/locales/en.yml b/lib/paperclip/locales/en.yml
index c8e31ee72..43fd583a5 100644
--- a/lib/paperclip/locales/en.yml
+++ b/lib/paperclip/locales/en.yml
@@ -2,7 +2,7 @@ en:
   errors:
     messages:
       in_between: "must be in between %{min} and %{max}"
-      spoofed_media_type: "media type is spoofed"
+      spoofed_media_type: "has an extension that does not match its contents"
 
   number:
     human:
diff --git a/test/validators/media_type_spoof_detection_validator_test.rb b/test/validators/media_type_spoof_detection_validator_test.rb
index efd4f91f4..6f6892c64 100644
--- a/test/validators/media_type_spoof_detection_validator_test.rb
+++ b/test/validators/media_type_spoof_detection_validator_test.rb
@@ -27,6 +27,6 @@ def build_validator(options = {})
     Paperclip::MediaTypeSpoofDetector.stubs(:using).returns(detector)
     @validator.validate(@dummy)
 
-    assert_equal "media type is spoofed", @dummy.errors[:avatar].first
+    assert_equal "has an extension that does not match its contents", @dummy.errors[:avatar].first
   end
 end