diff --git a/Makefile b/Makefile
index b630225..ff3acc1 100644
--- a/Makefile
+++ b/Makefile
@@ -149,7 +149,7 @@ sync-windows:
 	fi
 # Firefox
 	@$(WGET) $(REPO_SRC)/.mozilla/firefox/user.js -O $(APPDATA)/Mozilla/Firefox/Profiles/*.default-release/user.js
-	@$(CURL) $(REPO_SRC)/.mozilla/firefox/user-windows.js >> $(APPDATA)/Mozilla/Firefox/Profiles/*.default-release/user.js
+	@$(CURL) $(REPO_SRC)/.mozilla/firefox/user-windows.js >> $(wildcard $(APPDATA)/Mozilla/Firefox/Profiles/*.default-release)/user.js
 	@echo "(Windows) Firefox synced!"
 	@echo