diff --git a/include/osmocom/sgsn/gprs_gmm.h b/include/osmocom/sgsn/gprs_gmm.h
index b89eff5..3c93efc 100644
--- a/include/osmocom/sgsn/gprs_gmm.h
+++ b/include/osmocom/sgsn/gprs_gmm.h
@@ -40,4 +40,7 @@
 				uint8_t gmm_cause);
 int gsm48_tx_gmm_att_ack(struct sgsn_mm_ctx *mm);
 
+/* TODO: move extract_subscr_* when gsm48_gmm_authorize() got removed */
+void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx);
+void extract_subscr_hlr(struct sgsn_mm_ctx *ctx);
 #endif /* _GPRS_GMM_H */
diff --git a/src/gprs/gprs_gmm.c b/src/gprs/gprs_gmm.c
index df498c1..57d3883 100644
--- a/src/gprs/gprs_gmm.c
+++ b/src/gprs/gprs_gmm.c
@@ -848,7 +848,7 @@
 	return rc;
 }
 
-static void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx)
+void extract_subscr_msisdn(struct sgsn_mm_ctx *ctx)
 {
 	struct gsm_mncc_number called;
 	uint8_t msisdn[sizeof(ctx->subscr->sgsn_data->msisdn) + 1];
@@ -879,7 +879,7 @@
 	}
 }
 
-static void extract_subscr_hlr(struct sgsn_mm_ctx *ctx)
+void extract_subscr_hlr(struct sgsn_mm_ctx *ctx)
 {
 	struct gsm_mncc_number called;
 	uint8_t hlr_number[sizeof(ctx->subscr->sgsn_data->hlr) + 1];