diff --git a/randr/rrscreen.c b/randr/rrscreen.c
index 1bc1a9e..da6d48d 100644
--- a/randr/rrscreen.c
+++ b/randr/rrscreen.c
@@ -910,12 +910,6 @@ ProcRRSetScreenConfig (ClientPtr client)
      */
     width = mode->mode.width;
     height = mode->mode.height;
-    if (rotation & (RR_Rotate_90|RR_Rotate_270))
-    {
-	width = mode->mode.height;
-	height = mode->mode.width;
-    }
-
     if (width < pScrPriv->minWidth || pScrPriv->maxWidth < width) {
 	client->errorValue = width;
 	free(pData);
@@ -927,6 +921,12 @@ ProcRRSetScreenConfig (ClientPtr client)
 	return BadValue;
     }
 
+    if (rotation & (RR_Rotate_90|RR_Rotate_270))
+    {
+	width = mode->mode.height;
+	height = mode->mode.width;
+    }
+
     if (width != pScreen->width || height != pScreen->height)
     {
 	int	c;