diff --git a/pkgs/tools/security/efitools/default.nix b/pkgs/tools/security/efitools/default.nix
index 8a64a019fef0..33b6c3b672da 100644
--- a/pkgs/tools/security/efitools/default.nix
+++ b/pkgs/tools/security/efitools/default.nix
@@ -26,6 +26,7 @@ stdenv.mkDerivation rec {
     sed -i -e 's#/usr/include/efi#${gnu-efi}/include/efi/#g' Make.rules
     sed -i -e 's#/usr/lib64/gnuefi#${gnu-efi}/lib/#g' Make.rules
     sed -i -e 's#$(DESTDIR)/usr#$(out)#g' Make.rules
+    substituteInPlace lib/console.c --replace "EFI_WARN_UNKOWN_GLYPH" "EFI_WARN_UNKNOWN_GLYPH"
     patchShebangs .
   '';