diff --git a/interpreters/toywasm/src/toywasm_config.c b/interpreters/toywasm/src/toywasm_config.c
index 56c7f85d1..26c13da43 100644
--- a/interpreters/toywasm/src/toywasm_config.c
+++ b/interpreters/toywasm/src/toywasm_config.c
@@ -18,6 +18,10 @@
  *
  ****************************************************************************/
 
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
 /****************************************************************************
  * Public Data
  ****************************************************************************/