diff --git a/randr/randrstr.h b/randr/randrstr.h
index 136a47e43..99022c313 100644
--- a/randr/randrstr.h
+++ b/randr/randrstr.h
@@ -542,6 +542,13 @@ Bool
 RRCrtcGammaSetSize (RRCrtcPtr	crtc,
 		    int		size);
 
+/*
+ * Set the allowable rotations of the CRTC.
+ */
+Bool
+RRCrtcSetRotations (RRCrtcPtr crtc,
+		    Rotation rotations);
+
 /*
  * Destroy a Crtc at shutdown
  */
diff --git a/randr/rrcrtc.c b/randr/rrcrtc.c
index 076742077..cfd4da9f7 100644
--- a/randr/rrcrtc.c
+++ b/randr/rrcrtc.c
@@ -426,6 +426,16 @@ RRCrtcGammaSetSize (RRCrtcPtr	crtc,
     return TRUE;
 }
 
+/*
+ * Set the allowable rotations of the CRTC.
+ */
+Bool
+RRCrtcSetRotations (RRCrtcPtr crtc,
+		    Rotation rotations)
+{
+    crtc->rotations = rotations;
+}
+
 /*
  * Initialize crtc type
  */