diff --git a/openbsc/include/openbsc/silent_call.h b/openbsc/include/openbsc/silent_call.h
new file mode 100644
index 0000000..53ed4e2
--- /dev/null
+++ b/openbsc/include/openbsc/silent_call.h
@@ -0,0 +1,7 @@
+#ifndef _SILENT_CALL_H
+#define _SILENT_CALL_H
+
+extern int gsm_silent_call_start(struct gsm_subscriber *subscr, void *data);
+extern int gsm_silent_call_stop(struct gsm_subscriber *subscr);
+
+#endif /* _SILENT_CALL_H */
diff --git a/openbsc/src/vty_interface_layer3.c b/openbsc/src/vty_interface_layer3.c
index fe10703..4cc08c2 100644
--- a/openbsc/src/vty_interface_layer3.c
+++ b/openbsc/src/vty_interface_layer3.c
@@ -32,6 +32,7 @@
 #include <openbsc/linuxlist.h>
 #include <openbsc/gsm_data.h>
 #include <openbsc/gsm_subscriber.h>
+#include <openbsc/silent_call.h>
 #include <openbsc/gsm_04_11.h>
 #include <openbsc/e1_input.h>
 #include <openbsc/abis_nm.h>