diff --git a/tridactyl/makefile b/tridactyl/makefile
index e08a246..fd4ee86 100644
--- a/tridactyl/makefile
+++ b/tridactyl/makefile
@@ -8,7 +8,7 @@ SCRIPTS_TARGET := ~/.local/share/tridactyl/scripts
 install: | init update
 
 init:
-	if [[ $OSTYPE = darwin* ]] ; then
+	if [[ $$OSTYPE = darwin* ]] ; then
 		$(MAKE) -C $(SRC_DIR) setup
 	elif (( $$+commands[firefox] )) ; then
 		$(MAKE) -C $(SRC_DIR) setup