diff --git a/lib/rtl/rtl_source_c.cc b/lib/rtl/rtl_source_c.cc
index 4bd2f8d..7a63858 100644
--- a/lib/rtl/rtl_source_c.cc
+++ b/lib/rtl/rtl_source_c.cc
@@ -304,6 +304,7 @@ osmosdr::meta_range_t rtl_source_c::get_sample_rates()
 {
   osmosdr::meta_range_t range;
 
+  range += osmosdr::range_t( 250000 ); // known to work
   range += osmosdr::range_t( 1000000 ); // known to work
   range += osmosdr::range_t( 1024000 ); // known to work
   range += osmosdr::range_t( 1800000 ); // known to work
diff --git a/lib/rtl_tcp/rtl_tcp_source_c.cc b/lib/rtl_tcp/rtl_tcp_source_c.cc
index 1501bac..b9e4a00 100644
--- a/lib/rtl_tcp/rtl_tcp_source_c.cc
+++ b/lib/rtl_tcp/rtl_tcp_source_c.cc
@@ -120,6 +120,7 @@ osmosdr::meta_range_t rtl_tcp_source_c::get_sample_rates( void )
 {
   osmosdr::meta_range_t range;
 
+  range += osmosdr::range_t( 250000 ); // known to work
   range += osmosdr::range_t( 1000000 ); // known to work
   range += osmosdr::range_t( 1024000 ); // known to work
   range += osmosdr::range_t( 1800000 ); // known to work