diff --git a/src/Image.cc b/src/Image.cc
index 102f9d2..8826a33 100644
--- a/src/Image.cc
+++ b/src/Image.cc
@@ -254,7 +254,7 @@ Image::loadSurface() {
     case Image::JPEG: return loadJPEG();
 #endif
   }
-  return ThrowException(Exception::Error(String::New("failed to load image")));
+  return ThrowException(Exception::Error(String::New("failed to detect image format")));
 }
 
 /*