diff --git a/src/backends/native/meta-monitor-manager-kms.c b/src/backends/native/meta-monitor-manager-kms.c
index 5ad8bf591..3d2037c95 100644
--- a/src/backends/native/meta-monitor-manager-kms.c
+++ b/src/backends/native/meta-monitor-manager-kms.c
@@ -63,14 +63,6 @@
 #include "meta/main.h"
 #include "meta/meta-x11-errors.h"
 
-typedef struct
-{
-  GSource source;
-
-  gpointer fd_tag;
-  MetaMonitorManagerKms *manager_kms;
-} MetaKmsSource;
-
 struct _MetaMonitorManagerKms
 {
   MetaMonitorManager parent_instance;