diff --git a/src/bin/jp2/convertpng.c b/src/bin/jp2/convertpng.c
index abe86a64..5a72d9fe 100644
--- a/src/bin/jp2/convertpng.c
+++ b/src/bin/jp2/convertpng.c
@@ -406,8 +406,8 @@ int imagetopng(opj_image_t * image, const char *write_idf)
 							 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,  PNG_FILTER_TYPE_BASE);
 	
 	png_set_sBIT(png, info, &sig_bit);
-	//png_set_gamma(png, 2.2, 1./2.2);
-	//png_set_sRGB(png, info, PNG_sRGB_INTENT_PERCEPTUAL);
+	/* png_set_gamma(png, 2.2, 1./2.2); */
+	/* png_set_sRGB(png, info, PNG_sRGB_INTENT_PERCEPTUAL); */
 	png_write_info(png, info);
 	
 	/* setup conversion */