diff --git a/src/BulletCollision/CollisionShapes/btConvex2dShape.h b/src/BulletCollision/CollisionShapes/btConvex2dShape.h
index 58166c829..caf54329d 100644
--- a/src/BulletCollision/CollisionShapes/btConvex2dShape.h
+++ b/src/BulletCollision/CollisionShapes/btConvex2dShape.h
@@ -19,7 +19,7 @@ subject to the following restrictions:
 #include "BulletCollision/CollisionShapes/btConvexShape.h"
 #include "BulletCollision/BroadphaseCollision/btBroadphaseProxy.h" // for the types
 
-///The btConvex2dShape allows to use arbitrary convex shapes are 2d convex shapes, with the Z component assumed to be 0.
+///The btConvex2dShape allows to use arbitrary convex shapes as 2d convex shapes, with the Z component assumed to be 0.
 ///For 2d boxes, the btBox2dShape is recommended.
 class btConvex2dShape : public btConvexShape
 {