diff --git a/src/protocols/spice/channels/clipboard.c b/src/protocols/spice/channels/clipboard.c
index 00ecf6f2..9ff751d7 100644
--- a/src/protocols/spice/channels/clipboard.c
+++ b/src/protocols/spice/channels/clipboard.c
@@ -107,7 +107,7 @@ void guac_spice_clipboard_selection_handler(SpiceMainChannel channel,
 }
 
 void guac_spice_clipboard_selection_grab_handler(SpiceMainChannel channel,
-        guint selection, gpointer types, guint ntypes, guint extra, guac_client* client) {
+        guint selection, guint32* types, guint ntypes, guint extra, guac_client* client) {
 
     guac_client_log(client, GUAC_LOG_DEBUG, "Notifying client of clipboard grab"
             " in the guest.");
diff --git a/src/protocols/spice/channels/clipboard.h b/src/protocols/spice/channels/clipboard.h
index 6dfdb265..397d8a56 100644
--- a/src/protocols/spice/channels/clipboard.h
+++ b/src/protocols/spice/channels/clipboard.h
@@ -109,7 +109,7 @@ void guac_spice_clipboard_selection_handler(SpiceMainChannel channel,
  *     The guac_client that was passed in when the callback was registered.
  */
 void guac_spice_clipboard_selection_grab_handler(SpiceMainChannel channel,
-        guint selection, gpointer types, guint ntypes, guint other, guac_client* client);
+        guint selection, guint32* types, guint ntypes, guint other, guac_client* client);
 
 /**
  * A handler that will be called by the SPICE client when the SPICE server