diff --git a/include/osmocom/gprs/protocol/gsm_08_16.h b/include/osmocom/gprs/protocol/gsm_08_16.h
index e035ebf..f98f68d 100644
--- a/include/osmocom/gprs/protocol/gsm_08_16.h
+++ b/include/osmocom/gprs/protocol/gsm_08_16.h
@@ -7,6 +7,7 @@
 
 #include <stdint.h>
 #include <arpa/inet.h>
+#include <osmocom/core/utils.h>
 
 /*! \addtogroup libgb
  *  @{