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-rw-r--r--src/pcu_l1_if.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index ac04663e..6a0d58ee 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -238,7 +238,7 @@ void pcu_l1if_tx_pch(bitvec * block, int plen, const char *imsi)
data[3] = (plen << 2) | 0x01;
if (bts->gsmtap_categ_mask & (1 << PCU_GSMTAP_C_DL_PCH))
- gsmtap_send(bts->gsmtap, 0, 0, GSMTAP_CHANNEL_PCH, 0, 0, 0, 0, data + 4, 23);
+ gsmtap_send(bts->gsmtap, 0, 0, GSMTAP_CHANNEL_PCH, 0, 0, 0, 0, data + 3, 23);
pcu_tx_data_req(0, 0, PCU_IF_SAPI_PCH, 0, 0, 0, data, 23+3);
}