diff --git a/randr/randrstr_priv.h b/randr/randrstr_priv.h
index 7bd392e3e..2835f3798 100644
--- a/randr/randrstr_priv.h
+++ b/randr/randrstr_priv.h
@@ -530,4 +530,13 @@ void RRXineramaExtensionInit(void);
  */
 void RRTransformInit(RRTransformPtr transform);
 
+/*
+ * Compare two transform structures
+ *
+ * @param a   first transform
+ * @param b   second transform
+ * @return TRUE if both transforms are equal
+ */
+Bool RRTransformEqual(RRTransformPtr a, RRTransformPtr b);
+
 #endif /* _XSERVER_RANDRSTR_PRIV_H_ */
diff --git a/randr/rrtransform.h b/randr/rrtransform.h
index 5b93ce4c9..e6f27ac6d 100644
--- a/randr/rrtransform.h
+++ b/randr/rrtransform.h
@@ -39,9 +39,6 @@ struct _rrTransform {
     int height;
 };
 
-extern _X_EXPORT Bool
- RRTransformEqual(RRTransformPtr a, RRTransformPtr b);
-
 extern _X_EXPORT Bool
 
 RRTransformSetFilter(RRTransformPtr dst,