diff --git a/randr/rrtransform.c b/randr/rrtransform.c
index f9934d766..836a7aef4 100644
--- a/randr/rrtransform.c
+++ b/randr/rrtransform.c
@@ -20,6 +20,7 @@
  * OF THIS SOFTWARE.
  */
 
+#include "randrstr.h"
 #include "rrtransform.h"
 
 void