diff --git a/lib/jekyll/responsive_image/image_processor.rb b/lib/jekyll/responsive_image/image_processor.rb
index 5c42b32..51a02b0 100644
--- a/lib/jekyll/responsive_image/image_processor.rb
+++ b/lib/jekyll/responsive_image/image_processor.rb
@@ -4,7 +4,7 @@ module Jekyll
       include ResponsiveImage::Utils
 
       def process(image_path, config)
-        raise SyntaxError.new('Invalid image path specified') unless File.exists?(image_path.to_s)
+        raise SyntaxError.new("Invalid image path specified: #{image_path}") unless File.exists?(image_path.to_s)
 
         resize_handler = ResizeHandler.new
         img = Magick::Image::read(image_path).first