diff --git a/openbsc/include/openbsc/gsm_data_shared.h b/openbsc/include/openbsc/gsm_data_shared.h
index 2a3b0e2..2fdc763 100644
--- a/openbsc/include/openbsc/gsm_data_shared.h
+++ b/openbsc/include/openbsc/gsm_data_shared.h
@@ -57,9 +57,6 @@
 #define HARDCODED_BTS1_TS	6
 #define HARDCODED_BTS2_TS	11
 
-/* reserved according to GSM 03.03 § 2.4 */
-#define GSM_RESERVED_TMSI   0xFFFFFFFF
-
 enum gsm_hooks {
 	GSM_HOOK_NM_SWLOAD,
 	GSM_HOOK_RR_PAGING,
diff --git a/openbsc/src/gprs/gb_proxy_patch.c b/openbsc/src/gprs/gb_proxy_patch.c
index 59d0b2f..35355ba 100644
--- a/openbsc/src/gprs/gb_proxy_patch.c
+++ b/openbsc/src/gprs/gb_proxy_patch.c
@@ -23,7 +23,6 @@
 #include <openbsc/gprs_utils.h>
 #include <openbsc/gprs_gb_parse.h>
 
-#include <openbsc/gsm_data_shared.h>
 #include <openbsc/gsm_04_08_gprs.h>
 #include <openbsc/debug.h>
 
diff --git a/openbsc/src/gprs/gb_proxy_tlli.c b/openbsc/src/gprs/gb_proxy_tlli.c
index ccd118e..f554db1 100644
--- a/openbsc/src/gprs/gb_proxy_tlli.c
+++ b/openbsc/src/gprs/gb_proxy_tlli.c
@@ -18,12 +18,13 @@
  *
  */
 
+#include <osmocom/gsm/gsm48.h>
+
 #include <openbsc/gb_proxy.h>
 
 #include <openbsc/gprs_utils.h>
 #include <openbsc/gprs_gb_parse.h>
 
-#include <openbsc/gsm_data_shared.h>
 #include <openbsc/debug.h>
 
 #include <osmocom/gsm/gsm_utils.h>
diff --git a/openbsc/src/gprs/gprs_gb_parse.c b/openbsc/src/gprs/gprs_gb_parse.c
index 72c0d57..f2ab200 100644
--- a/openbsc/src/gprs/gprs_gb_parse.c
+++ b/openbsc/src/gprs/gprs_gb_parse.c
@@ -18,12 +18,13 @@
  *
  */
 
+#include <osmocom/gsm/gsm48.h>
+
 #include <openbsc/gprs_gb_parse.h>
 
 #include <openbsc/gprs_utils.h>
 
 #include <openbsc/gsm_04_08_gprs.h>
-#include <openbsc/gsm_data_shared.h>
 #include <openbsc/debug.h>
 
 #include <osmocom/gprs/gprs_bssgp.h>