diff --git a/Makefile b/Makefile
index e4a7a76d..81d648c7 100644
--- a/Makefile
+++ b/Makefile
@@ -96,7 +96,7 @@ jar: ${JAR}
 
 install: needs_chrome_dir ${JAR}
 	@echo "Installing JAR..."
-	${Q}cp ${CP_V} ${JAR} ${INSTALL_CHROME}
+	${Q}cp ${CP_V} ${JAR} "${INSTALL_CHROME}"
 
 release: ${XPI} ${RDF}