diff --git a/linux/drm.h b/linux/drm.h
index 0e6a4b46..e270da8b 100644
--- a/linux/drm.h
+++ b/linux/drm.h
@@ -52,6 +52,7 @@
 #define DRM_DEV_GID	 0
 
 
+#define DRM_MAJOR       226
 #define DRM_NAME	"drm"	  /* Name in kernel, /dev, and /proc	    */
 #define DRM_MIN_ORDER	5	  /* At least 2^5 bytes = 32 bytes	    */
 #define DRM_MAX_ORDER	22	  /* Up to 2^22 bytes = 4MB		    */
diff --git a/shared-core/drm.h b/shared-core/drm.h
index 0e6a4b46..e270da8b 100644
--- a/shared-core/drm.h
+++ b/shared-core/drm.h
@@ -52,6 +52,7 @@
 #define DRM_DEV_GID	 0
 
 
+#define DRM_MAJOR       226
 #define DRM_NAME	"drm"	  /* Name in kernel, /dev, and /proc	    */
 #define DRM_MIN_ORDER	5	  /* At least 2^5 bytes = 32 bytes	    */
 #define DRM_MAX_ORDER	22	  /* Up to 2^22 bytes = 4MB		    */
diff --git a/shared/drm.h b/shared/drm.h
index 0e6a4b46..e270da8b 100644
--- a/shared/drm.h
+++ b/shared/drm.h
@@ -52,6 +52,7 @@
 #define DRM_DEV_GID	 0
 
 
+#define DRM_MAJOR       226
 #define DRM_NAME	"drm"	  /* Name in kernel, /dev, and /proc	    */
 #define DRM_MIN_ORDER	5	  /* At least 2^5 bytes = 32 bytes	    */
 #define DRM_MAX_ORDER	22	  /* Up to 2^22 bytes = 4MB		    */