diff --git a/libretro-common/file/config_file.c b/libretro-common/file/config_file.c
index 67c0703ff6..66e03f3f7b 100644
--- a/libretro-common/file/config_file.c
+++ b/libretro-common/file/config_file.c
@@ -923,7 +923,7 @@ bool config_file_write(config_file_t *conf, const char *path)
 
       /* TODO: this is only useful for a few platforms, find which and add ifdef */
       buf = calloc(1, 0x4000);
-      setvbuf(file, buf, _IOFBF, 0x4000);
+      setvbuf(file, (char*)buf, _IOFBF, 0x4000);
 
       config_file_dump(conf, file);
    }