diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index c1b438e..7bf30e7 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -54,6 +54,7 @@
 #include <openbsc/ussd.h>
 #include <openbsc/silent_call.h>
 #include <openbsc/bsc_api.h>
+#include <openbsc/osmo_msc.h>
 
 void *tall_locop_ctx;
 void *tall_authciphop_ctx;
diff --git a/openbsc/src/silent_call.c b/openbsc/src/silent_call.c
index 7ba451b..8bd16d2 100644
--- a/openbsc/src/silent_call.c
+++ b/openbsc/src/silent_call.c
@@ -33,6 +33,7 @@
 #include <openbsc/gsm_subscriber.h>
 #include <openbsc/abis_rsl.h>
 #include <openbsc/chan_alloc.h>
+#include <openbsc/osmo_msc.h>
 
 /* paging of the requested subscriber has completed */
 static int paging_cb_silent(unsigned int hooknum, unsigned int event,
diff --git a/openbsc/src/transaction.c b/openbsc/src/transaction.c
index a29c07d..59414a4 100644
--- a/openbsc/src/transaction.c
+++ b/openbsc/src/transaction.c
@@ -28,6 +28,7 @@
 #include <openbsc/gsm_04_08.h>
 #include <openbsc/mncc.h>
 #include <openbsc/paging.h>
+#include <openbsc/osmo_msc.h>
 
 void *tall_trans_ctx;
 
diff --git a/openbsc/src/ussd.c b/openbsc/src/ussd.c
index 3c27646..19b494f 100644
--- a/openbsc/src/ussd.c
+++ b/openbsc/src/ussd.c
@@ -33,6 +33,7 @@
 #include <openbsc/gsm_04_80.h>
 #include <openbsc/gsm_subscriber.h>
 #include <openbsc/debug.h>
+#include <openbsc/osmo_msc.h>
 
 /* Declarations of USSD strings to be recognised */
 const char USSD_TEXT_OWN_NUMBER[] = "*#100#";