diff --git a/core/grub/build b/core/grub/build
index 7c07406c..fd152ce6 100755
--- a/core/grub/build
+++ b/core/grub/build
@@ -9,6 +9,8 @@ build_grub() (
     cp -R grub "grub-${1##*=}"
     cd "grub-${1##*=}"
 
+    autoreconf -fi
+
     ./configure \
         --prefix=/usr \
         --sbindir=/usr/bin \