diff --git a/src/gprs_rlcmac.cpp b/src/gprs_rlcmac.cpp
index 4d93f8f..7a98a25 100644
--- a/src/gprs_rlcmac.cpp
+++ b/src/gprs_rlcmac.cpp
@@ -32,7 +32,7 @@
 	const char *imsi)
 {
 	LOGP(DRLCMAC, LOGL_NOTICE, "TX: [PCU -> BTS] Paging Request (CCCH)\n");
-	bitvec *paging_request = bitvec_alloc(23, tall_pcu_ctx);
+	bitvec *paging_request = bitvec_alloc(22, tall_pcu_ctx);
 	bitvec_unhex(paging_request, DUMMY_VEC);
 	int plen = Encoding::write_paging_request(paging_request, ptmsi, ptmsi_len);
 	pcu_l1if_tx_pch(paging_request, plen, (char *)imsi);