diff --git a/util/grub-install-common.c b/util/grub-install-common.c
index 37c1a98b9..0364b327c 100644
--- a/util/grub-install-common.c
+++ b/util/grub-install-common.c
@@ -902,7 +902,7 @@ grub_install_get_target (const char *src)
 {
   char *fn;
   grub_util_fd_t f;
-  char buf[2048];
+  char buf[8192];
   ssize_t r;
   char *c, *pl, *p;
   size_t i;