diff --git a/cheetah.ts b/cheetah.ts
index fc48694..31a0288 100644
--- a/cheetah.ts
+++ b/cheetah.ts
@@ -370,7 +370,7 @@ export class cheetah<
             query[key] = true
           else if (value === 'false')
             query[key] = false
-          else if (value.indexOf(',') < 0)
+          else if (value.indexOf(',') > -1)
             query[key] = value.split(',')
           else if (!isNaN((value as unknown) as number) && !isNaN(parseFloat(value)))
             query[key] = parseInt(value)