diff --git a/pipi/codec/opencv.c b/pipi/codec/opencv.c
index a896c64..11e3dc4 100644
--- a/pipi/codec/opencv.c
+++ b/pipi/codec/opencv.c
@@ -92,7 +92,7 @@ int pipi_save_opencv(pipi_image_t *img, const char *name)
     }
 
     pipi_set_colorspace(img, img->codec_format);
-    cvSaveImage(name, img->codec_priv);
+    cvSaveImage(name, img->codec_priv, NULL);
 
     return 0;
 }