diff --git a/src/machine/m_at_sockets7.c b/src/machine/m_at_sockets7.c
index 47ee28a29..2ab21d856 100644
--- a/src/machine/m_at_sockets7.c
+++ b/src/machine/m_at_sockets7.c
@@ -40,6 +40,7 @@
 #include <86box/video.h>
 #include "cpu.h"
 #include <86box/machine.h>
+#include <86box/snd_ac97.h>
 #include <86box/clock.h>