diff --git a/bootstrap.conf b/bootstrap.conf
index 6d383240e..4c8c37c16 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -79,7 +79,7 @@ cp -a INSTALL INSTALL.grub
 
 bootstrap_post_import_hook () {
   set -e
-  for patchname in fix-base64 fix-null-deref fix-width no-abort; do
+  for patchname in fix-base64 fix-null-deref fix-unused-value fix-width no-abort; do
     patch -d grub-core/lib/gnulib -p2 \
       < "grub-core/lib/gnulib-patches/$patchname.patch"
   done
diff --git a/conf/Makefile.extra-dist b/conf/Makefile.extra-dist
index 37dc3aa10..0d3b74e8e 100644
--- a/conf/Makefile.extra-dist
+++ b/conf/Makefile.extra-dist
@@ -30,6 +30,7 @@ EXTRA_DIST += grub-core/genemuinitheader.sh
 
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-base64.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-null-deref.patch
+EXTRA_DIST += grub-core/lib/gnulib-patches/fix-unused-value.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-width.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/no-abort.patch
 
diff --git a/grub-core/lib/gnulib-patches/fix-unused-value.patch b/grub-core/lib/gnulib-patches/fix-unused-value.patch
new file mode 100644
index 000000000..ba51f1bf2
--- /dev/null
+++ b/grub-core/lib/gnulib-patches/fix-unused-value.patch
@@ -0,0 +1,14 @@
+--- a/lib/regexec.c	2020-10-21 14:25:35.310195912 +0000
++++ b/lib/regexec.c	2020-10-21 14:32:07.961765604 +0000
+@@ -828,7 +828,11 @@
+ 		    break;
+ 		  if (__glibc_unlikely (err != REG_NOMATCH))
+ 		    goto free_return;
++#ifdef DEBUG
++		  /* Only used for assertion below when DEBUG is set, otherwise
++		     it will be over-written when we loop around.  */
+ 		  match_last = -1;
++#endif
+ 		}
+ 	      else
+ 		break; /* We found a match.  */