diff --git a/libs/ardour/ltc_file_reader.cc b/libs/ardour/ltc_file_reader.cc
index e6dfdabac1..3851eee22c 100644
--- a/libs/ardour/ltc_file_reader.cc
+++ b/libs/ardour/ltc_file_reader.cc
@@ -19,6 +19,9 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 
+#include <glib.h>
+#include <pbd/gstdio_compat.h>
+
 #include <assert.h>
 #include <string.h>
 #include <glibmm.h>