...

diff --git a/MagickCore/blob.c b/MagickCore/blob.c
index 793c9d28180597502556db8a4caa252b9d19a58e..90dbfd00e5ccbe7e86f55463af2e29db9cc6eb63 100644 (file)
--- a/MagickCore/blob.c
+++ b/MagickCore/blob.c
@@ -3292,6 +3292,8 @@ MagickExport MagickBooleanType OpenBlob(const ImageInfo *image_info,
           {
             if (mode == WriteBinaryBlobMode)
               type="wb";
+            if (mode == AppendBinaryBlobMode)
+              type="ab";
             blob_info->file_info.gzfile=gzopen(filename,type);
             if (blob_info->file_info.gzfile != (gzFile) NULL)
               blob_info->type=ZipStream;