diff --git a/srcpkgs/xen/template b/srcpkgs/xen/template
index b444ddc1e28..26268cc0098 100644
--- a/srcpkgs/xen/template
+++ b/srcpkgs/xen/template
@@ -48,7 +48,7 @@ pre_configure() {
 	local i _gccver=$(gcc --version | awk '/^gcc \(GCC\)/ { print $3 }')
 	[ "${_gccver%%.*}" -lt 6 ] && return 0
 
-	sed -i tools/configure -e's; -Werror;-Wno-error;g'
+	sed -i tools/configure -e's;-Werror;-Wno-error;g'
 	# Copy patches for _ipxe.tar.gz contents
 	for i in $(seq 1 6); do
 		cp ${FILESDIR}/gcc6_fix_${i}.patch tools/firmware/etherboot/patches