diff --git a/gui/keymap.cc b/gui/keymap.cc
index 3426b6b..7bf76d8 100644
--- a/gui/keymap.cc
+++ b/gui/keymap.cc
@@ -30,6 +30,10 @@
 #include "gui.h"
 #include "keymap.h"

+#if defined(__APPLE__)
+#include <libgen.h>
+#endif
+
 // Table of bochs "BX_KEY_*" symbols
 // the table must be in BX_KEY_* order
 const char *bx_key_symbol[BX_KEY_NBKEYS] = {