diff --git a/json_object.c b/json_object.c
index 2971f08..458163c 100644
--- a/json_object.c
+++ b/json_object.c
@@ -806,6 +806,7 @@ static int json_object_double_to_json_string_format(struct json_object* jso,
 	else
 	{
 		const char *std_format = "%.17g";
+		int format_drops_decimals = 0;
 
 		if (!format)
 		{
@@ -830,7 +831,6 @@ static int json_object_double_to_json_string_format(struct json_object* jso,
 		else
 			p = strchr(buf, '.');
 
-		int format_drops_decimals = 0;
 		if (format == std_format || strstr(format, ".0f") == NULL)
 			format_drops_decimals = 1;