diff --git a/poppler.defs b/poppler.defs
index 8b12e03..2b8fc16 100644
--- a/poppler.defs
+++ b/poppler.defs
@@ -570,18 +570,6 @@
   )
 )
 
-(define-enum Orientation
-  (in-module "Poppler")
-  (c-name "PopplerOrientation")
-  (gtype-id "POPPLER_TYPE_ORIENTATION")
-  (values
-    '("portrait" "POPPLER_ORIENTATION_PORTRAIT")
-    '("landscape" "POPPLER_ORIENTATION_LANDSCAPE")
-    '("upsidedown" "POPPLER_ORIENTATION_UPSIDEDOWN")
-    '("seascape" "POPPLER_ORIENTATION_SEASCAPE")
-  )
-)
-
 (define-enum PageTransitionType
   (in-module "Poppler")
   (c-name "PopplerPageTransitionType")