diff --git a/host/lib/usrp/cores/tx_dsp_core_200.cpp b/host/lib/usrp/cores/tx_ds
index 7f02d59..2faf7c2 100644
--- a/host/lib/usrp/cores/tx_dsp_core_200.cpp
+++ b/host/lib/usrp/cores/tx_dsp_core_200.cpp
@@ -192,6 +192,8 @@ public:
         }
         else throw uhd::value_error("USRP TX cannot handle requested wire forma

+        _host_extra_scaling /= stream_args.args.cast<double>("fullscale", 1.0);
+
         this->update_scalar();

         _iface->poke32(REG_TX_CTRL_FORMAT, format_word);