diff --git a/src/protocols/rdp/rdp_disp.c b/src/protocols/rdp/rdp_disp.c
index ee2d627a..cd18cb39 100644
--- a/src/protocols/rdp/rdp_disp.c
+++ b/src/protocols/rdp/rdp_disp.c
@@ -72,9 +72,11 @@ void guac_rdp_disp_load_plugin(rdpContext* context) {
 
 }
 
+#ifdef HAVE_FREERDP_DISPLAY_UPDATE_SUPPORT
 void guac_rdp_disp_connect(guac_rdp_disp* guac_disp, DispClientContext* disp) {
     guac_disp->disp = disp;
 }
+#endif
 
 /**
  * Fits a given dimension within the allowed bounds for Display Update
diff --git a/src/protocols/rdp/rdp_disp.h b/src/protocols/rdp/rdp_disp.h
index b2516b55..d2462714 100644
--- a/src/protocols/rdp/rdp_disp.h
+++ b/src/protocols/rdp/rdp_disp.h
@@ -107,6 +107,7 @@ void guac_rdp_disp_free(guac_rdp_disp* disp);
  */
 void guac_rdp_disp_load_plugin(rdpContext* context);
 
+#ifdef HAVE_FREERDP_DISPLAY_UPDATE_SUPPORT
 /**
  * Stores the given DispClientContext within the given guac_rdp_disp, such that
  * display updates can be properly sent. Until this is called, changes to the
@@ -118,6 +119,7 @@ void guac_rdp_disp_load_plugin(rdpContext* context);
  *             display update channel.
  */
 void guac_rdp_disp_connect(guac_rdp_disp* guac_disp, DispClientContext* disp);
+#endif
 
 /**
  * Requests a display size update, which may then be sent immediately to the