diff --git a/extra/efivar/build b/extra/efivar/build
index 8f51eebd..762b19f8 100755
--- a/extra/efivar/build
+++ b/extra/efivar/build
@@ -1,5 +1,10 @@
 #!/bin/sh -e
 
+# LTO is used when CFLAGS are unset causing a compilation
+# error with GCC 10. LTO can be set by the user though
+# '-flto-partition=none' is also needed.
+sed -i 's/ -flto//' Make.defaults
+
 for patch in *.patch; do
     patch -p1 < "$patch"
 done