diff --git a/src/corelib/entry.c b/src/corelib/entry.c
index a1c857f..4489250 100644
--- a/src/corelib/entry.c
+++ b/src/corelib/entry.c
@@ -1,8 +1,9 @@
-#include "engine.h"
+#include "entry.h"
 #include "world.h"
-#include "corelib/assets.h"
-#include "corelib/render.h"
-#include "corelib/input.h"
+#include "assets.h"
+#include "render.h"
+#include "input.h"
+
 #include "time.h"
 
 static double _delta_time = 0;
diff --git a/src/corelib/entry.h b/src/corelib/entry.h
index 8667836..db8843a 100644
--- a/src/corelib/entry.h
+++ b/src/corelib/entry.h
@@ -1,10 +1,6 @@
 #ifndef _engine_h
 #define _engine_h
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 extern float delta_time();
 extern void set_frame_interval(double frame_interval);
 extern void set_frame_rate_limit(int fps);
@@ -16,8 +12,4 @@ extern void update_game();
 extern void update_ui();
 extern void game_exit();
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* _engine_h */
diff --git a/src/game.c b/src/game.c
index 81b040f..37f1f8e 100644
--- a/src/game.c
+++ b/src/game.c
@@ -1,5 +1,5 @@
-#include "engine.h"
-#include "world.h"
+#include "corelib/entry.h"
+#include "corelib/world.h"
 #include "corelib/input.h"
 #include "corelib/render.h"
 #include "corelib/assets.h"