diff --git a/kpatch-build/kpatch-build b/kpatch-build/kpatch-build
index 8632434826e2e24e0b7435f23d244f3adbf4df1f..2afb3a1f34e58fddfca5de56decc9aa695dcd5ab 100755
--- a/kpatch-build/kpatch-build
+++ b/kpatch-build/kpatch-build
@@ -856,6 +856,7 @@ if [[ -n "$USERSRCDIR" ]]; then
         if [[ -z "$ARCHVERSION" ]] && [[ -f "$CONFIGFILE" ]]; then
             ARCHVERSION="$(kernel_version_from_config)"
         fi
+        sed -i "s/^EXTRAVERSION.*/EXTRAVERSION = -${ARCHVERSION##*-}/" "$KERNEL_SRCDIR/Makefile" || die
 	fi
 fi