diff --git a/src/bufferparams.h b/src/bufferparams.h
index e5b0d2f6c7..720526e9bc 100644
--- a/src/bufferparams.h
+++ b/src/bufferparams.h
@@ -23,6 +23,8 @@
 #include "support/copied_ptr.h"
 #include "support/types.h"
 
+#include "frontends/controllers/biblio.h"
+
 #include <vector>
 
 
@@ -39,10 +41,6 @@ class TexRow;
 class VSpace;
 class Language;
 
-namespace biblio {
-enum CiteEngine;
-} // namespace biblio
-
 
 /** Buffer parameters.
  *  This class contains all the parameters for this a buffer uses. Some