diff --git a/src/gb_proxy_patch.c b/src/gb_proxy_patch.c
index 2bc3b4b..9c70d3f 100644
--- a/src/gb_proxy_patch.c
+++ b/src/gb_proxy_patch.c
@@ -18,6 +18,7 @@
  *
  */
 
+#include <osmocom/gprs/gprs_msgb.h>
 #include <osmocom/sgsn/gb_proxy.h>
 
 #include <osmocom/sgsn/gprs_utils.h>