diff --git a/lib/soapy/soapy_sink_c.cc b/lib/soapy/soapy_sink_c.cc
index 076aa56..dd4130e 100644
--- a/lib/soapy/soapy_sink_c.cc
+++ b/lib/soapy/soapy_sink_c.cc
@@ -167,9 +167,7 @@ double soapy_sink_c::get_center_freq( size_t chan)
 
 double soapy_sink_c::set_freq_corr( double ppm, size_t chan)
 {
-    SoapySDR::Kwargs kw;
-    kw["CORR"] = boost::lexical_cast<std::string>(ppm);
-    _device->setFrequency(SOAPY_SDR_TX, chan, this->get_center_freq(chan), kw);
+    _device->setFrequency(SOAPY_SDR_TX, chan, "CORR", ppm);
     return this->get_freq_corr(chan);
 }
 
diff --git a/lib/soapy/soapy_source_c.cc b/lib/soapy/soapy_source_c.cc
index 05c7a05..4bd3aa3 100644
--- a/lib/soapy/soapy_source_c.cc
+++ b/lib/soapy/soapy_source_c.cc
@@ -164,9 +164,7 @@ double soapy_source_c::get_center_freq( size_t chan )
 
 double soapy_source_c::set_freq_corr( double ppm, size_t chan )
 {
-    SoapySDR::Kwargs kw;
-    kw["CORR"] = boost::lexical_cast<std::string>(ppm);
-    _device->setFrequency(SOAPY_SDR_RX, chan, this->get_center_freq(chan), kw);
+    _device->setFrequency(SOAPY_SDR_RX, chan, "CORR", ppm);
     return this->get_freq_corr(chan);
 }