diff --git a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
index dd29d01fae..ac14633130 100644
--- a/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
+++ b/targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
@@ -1125,7 +1125,7 @@ extern "C" {
   
       case 15360000:
         //openair0_cfg[0].samples_per_packet    = 2048;
-        openair0_cfg[0].tx_sample_advance     = 45;
+        openair0_cfg[0].tx_sample_advance     = 40;
         openair0_cfg[0].tx_bw                 = 10e6;
         openair0_cfg[0].rx_bw                 = 10e6;
         break;