diff --git a/src/gsm_rlcmac.cpp b/src/gsm_rlcmac.cpp
index 44bc5e13..6b43aa6d 100644
--- a/src/gsm_rlcmac.cpp
+++ b/src/gsm_rlcmac.cpp
@@ -5509,3 +5509,11 @@ void encode_gsm_rlcmac_downlink_data(bitvec * vector, RlcMacDownlinkDataBlock_t
     LOGPC(DRLCMACDATA, LOGL_NOTICE, "\n");
   }
 }
+
+void decode_gsm_ra_cap(bitvec * vector, MS_Radio_Access_capability_t *data)
+{
+  csnStream_t      ar;
+  unsigned readIndex = 0;
+  csnStreamInit(&ar, 0, 8 * vector->data_len);
+  /*ret =*/ csnStreamDecoder(&ar, CSNDESCR(MS_Radio_Access_capability_t), vector, readIndex, data);
+}
diff --git a/src/gsm_rlcmac.h b/src/gsm_rlcmac.h
index 49c596dc..8f4039c5 100644
--- a/src/gsm_rlcmac.h
+++ b/src/gsm_rlcmac.h
@@ -5136,4 +5136,5 @@ typedef struct
  void encode_gsm_rlcmac_uplink(bitvec * vector, RlcMacUplink_t * data);
  void decode_gsm_rlcmac_uplink_data(bitvec * vector, RlcMacUplinkDataBlock_t * data);
  void encode_gsm_rlcmac_downlink_data(bitvec * vector, RlcMacDownlinkDataBlock_t * data);
+ void decode_gsm_ra_cap(bitvec * vector, MS_Radio_Access_capability_t * data);
 #endif /* __PACKET_GSM_RLCMAC_H__ */