diff --git a/src/BulletDynamics/Character/btKinematicCharacterController.h b/src/BulletDynamics/Character/btKinematicCharacterController.h
index ad2f9f11a..ef01f8a3e 100644
--- a/src/BulletDynamics/Character/btKinematicCharacterController.h
+++ b/src/BulletDynamics/Character/btKinematicCharacterController.h
@@ -25,6 +25,7 @@ subject to the following restrictions:
 
 
 class btCollisionShape;
+class btConvexShape;
 class btRigidBody;
 class btCollisionWorld;
 class btCollisionDispatcher;