diff --git a/json_object.c b/json_object.c
index 825630f..5a35938 100644
--- a/json_object.c
+++ b/json_object.c
@@ -463,7 +463,7 @@ static int json_object_double_to_json_string(struct json_object* jso,
 					     int level,
 						 int flags)
 {
-  return sprintbuf(pb, "%lf", jso->o.c_double);
+  return sprintbuf(pb, "%f", jso->o.c_double);
 }
 
 struct json_object* json_object_new_double(double d)