diff --git a/src/lua_civet.h b/src/lua_civet.h
new file mode 100644
index 00000000..e80fe609
--- /dev/null
+++ b/src/lua_civet.h
@@ -0,0 +1,4 @@
+/* "lua_civet.h" */
+/* Project internal header to allow main.c to call a non-public function in mod_lua.inl */
+
+void lua_civet_open_all_libs(lua_State *L);
diff --git a/src/main.c b/src/main.c
index 1052358a..721f1fd1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -641,7 +641,8 @@ static void set_absolute_path(char *options[],
 #ifdef USE_LUA
 #include "lua.h"
 #include "lauxlib.h"
-extern void lua_civet_open_all_libs(lua_State *L);
+#include "lua_civet.h"
+
 
 static int run_lua(const char *file_name)
 {
diff --git a/src/mod_lua.inl b/src/mod_lua.inl
index 3fe4c44c..2c6b0f7f 100644
--- a/src/mod_lua.inl
+++ b/src/mod_lua.inl
@@ -1,5 +1,6 @@
 #include <lua.h>
 #include <lauxlib.h>
+#include "lua_civet.h"
 
 #ifdef _WIN32
 static void *