diff --git a/Makefile b/Makefile
index dbae3cf..679c711 100644
--- a/Makefile
+++ b/Makefile
@@ -146,7 +146,7 @@ boot.iso: $(_LORAX_TEMPLATES) $(_REPO_FILES)
 	rm -Rf $(_BASE_DIR)/results || true
 	mv /etc/rpm/macros.image-language-conf /etc/rpm/macros.image-language-conf.orig || true
 	cp /etc/os-release /etc/os-release.orig || true
-	sed -i 's/PLATFORM_ID=.*/PLATFORM_ID="$(_PLATFORM_ID)"/" /etc/os-release
+	sed -i 's/PLATFORM_ID=.*/PLATFORM_ID="$(_PLATFORM_ID)"/' /etc/os-release
 
 	# Download the secure boot key
 	if [ -n "$(SECURE_BOOT_KEY_URL)" ]; \