diff --git a/services/redis.nix b/services/redis.nix
index c30e0ef..d10d21b 100644
--- a/services/redis.nix
+++ b/services/redis.nix
@@ -46,8 +46,8 @@ let
           ''
       }
       export REDISDATA
-      if [ ! -d $REDISDATA ]; then
-        mkdir -p $REDISDATA
+      if [ ! -d "$REDISDATA" ]; then
+        mkdir -p "$REDISDATA"
       fi
       ${generateRedisConfig}
       ${package}/bin/redis-server "$RUNTIME_PATH"/${name}.conf --daemonize no --dir "$REDISDATA"