diff --git a/lib/bladerf/bladerf_sink_c.cc b/lib/bladerf/bladerf_sink_c.cc
index 5d24318..244284c 100644
--- a/lib/bladerf/bladerf_sink_c.cc
+++ b/lib/bladerf/bladerf_sink_c.cc
@@ -631,6 +631,9 @@ double bladerf_sink_c::set_bandwidth( double bandwidth, size_t chan )
   int ret;
   uint32_t actual;
 
+  if ( bandwidth == 0.0 ) /* bandwidth of 0 means automatic filter selection */
+    bandwidth = get_sample_rate() * 0.75; /* select narrower filters to prevent aliasing */
+
   ret = bladerf_set_bandwidth( _dev, BLADERF_MODULE_TX, (uint32_t)bandwidth, &actual );
   if( ret ) {
     throw std::runtime_error( std::string(__FUNCTION__) + " " +
diff --git a/lib/bladerf/bladerf_source_c.cc b/lib/bladerf/bladerf_source_c.cc
index 931e33b..aba6964 100644
--- a/lib/bladerf/bladerf_source_c.cc
+++ b/lib/bladerf/bladerf_source_c.cc
@@ -599,6 +599,9 @@ double bladerf_source_c::set_bandwidth( double bandwidth, size_t chan )
   int ret;
   uint32_t actual;
 
+  if ( bandwidth == 0.0 ) /* bandwidth of 0 means automatic filter selection */
+    bandwidth = get_sample_rate() * 0.75; /* select narrower filters to prevent aliasing */
+
   ret = bladerf_set_bandwidth( _dev, BLADERF_MODULE_RX, (uint32_t)bandwidth, &actual );
   if( ret ) {
     throw std::runtime_error( std::string(__FUNCTION__) + " " +