diff --git a/openbsc/src/gprs/gprs_gmm.c b/openbsc/src/gprs/gprs_gmm.c
index 1026474..9efe402 100644
--- a/openbsc/src/gprs/gprs_gmm.c
+++ b/openbsc/src/gprs/gprs_gmm.c
@@ -64,6 +64,7 @@
 #include <openbsc/gprs_sgsn.h>
 #include <openbsc/gprs_gmm.h>
 #include <openbsc/gprs_utils.h>
+#include <openbsc/gprs_subscriber.h>
 #include <openbsc/sgsn.h>
 #include <openbsc/signal.h>
 #include <openbsc/iu.h>