diff --git a/bob/io/image/jpeg.cpp b/bob/io/image/jpeg.cpp
index 33d21ca7a48e3fa28a2c7af846d72c9f6e5d97fe..0c358b89d1dfe41b84cf2d74e2ccc1d1a5551fcb 100644
--- a/bob/io/image/jpeg.cpp
+++ b/bob/io/image/jpeg.cpp
@@ -271,7 +271,7 @@ static void im_save (const std::string& filename, const bob::io::base::array::in
   jpeg_set_quality(&cinfo, s_jpeg_quality, TRUE);
 
   // 4.
-  jpeg_start_compress(&cinfo, true);
+  jpeg_start_compress(&cinfo, TRUE);
 
   // Writes content
   if(info.dtype == bob::io::base::array::t_uint8) {