diff --git a/sys/dev/drm2/drmP.h b/sys/dev/drm2/drmP.h
index 624a316b6bc6..25765c4902b5 100644
--- a/sys/dev/drm2/drmP.h
+++ b/sys/dev/drm2/drmP.h
@@ -961,7 +961,7 @@ struct drm_device {
 
 	drm_agp_head_t    *agp;
 	drm_sg_mem_t      *sg;  /* Scatter gather memory */
-	u_long            *ctx_bitmap;
+	unsigned long     *ctx_bitmap;
 	void		  *dev_private;
 	unsigned int	  agp_buffer_token;
 	drm_local_map_t   *agp_buffer_map;