diff --git a/src/common/impl/lua.c b/src/common/impl/lua.c
index e1384c5e3..ffc1d83c9 100644
--- a/src/common/impl/lua.c
+++ b/src/common/impl/lua.c
@@ -138,7 +138,7 @@ static int yyjsonEncode(lua_State* L) {
     }
 }
 
-const char* ffLuaLoadState() {
+const char* ffLuaLoadState(void) {
     if (luaData.inited) {
         if (luaData.L == NULL) {
             return "Lua library is not available";