diff --git a/lib/suo/client/memcached.rb b/lib/suo/client/memcached.rb
index 2aabc8a..09f5aa7 100644
--- a/lib/suo/client/memcached.rb
+++ b/lib/suo/client/memcached.rb
@@ -16,7 +16,7 @@ module Suo
         @client.get_cas(@key)
       end
 
-      def set(newval, cas, expire:)
+      def set(newval, cas, expire: false)
         if expire
           @client.set_cas(@key, newval, cas, @options[:ttl])
         else
diff --git a/lib/suo/client/redis.rb b/lib/suo/client/redis.rb
index 98861f9..7bd740a 100644
--- a/lib/suo/client/redis.rb
+++ b/lib/suo/client/redis.rb
@@ -18,7 +18,7 @@ module Suo
         [@client.get(@key), nil]
       end
 
-      def set(newval, _, expire:)
+      def set(newval, _, expire: false)
         ret = @client.multi do |multi|
           if expire
             multi.setex(@key, @options[:ttl], newval)