diff --git a/lib/ogsf/gsd_img_tif.c b/lib/ogsf/gsd_img_tif.c
index 47f9b4ebbc5..c2518bb8bea 100644
--- a/lib/ogsf/gsd_img_tif.c
+++ b/lib/ogsf/gsd_img_tif.c
@@ -116,6 +116,7 @@ int GS_write_tif(const char *name)
     }
 
     G_free((void *)pixbuf);
+    G_free(buf);
     (void)TIFFClose(out);
 
     return (0);