diff --git a/gnu/lib/libdialog/dialog.priv.h b/gnu/lib/libdialog/dialog.priv.h
index 68b136fcca0c..06c01a574cb7 100644
--- a/gnu/lib/libdialog/dialog.priv.h
+++ b/gnu/lib/libdialog/dialog.priv.h
@@ -25,6 +25,7 @@
 #include <ctype.h>
 #include <stdlib.h>
 #include <string.h>
+#include <termios.h>
 
 #if defined(LOCALE)
 #include <locale.h>