diff --git a/Readme.md b/Readme.md
index 8c0b4d340..99ac45cd3 100644
--- a/Readme.md
+++ b/Readme.md
@@ -119,7 +119,7 @@ HackRF is better used with a sampling rate of 4.8 MS/s and above. The 2.4 and 3.
 
 [LimeSDR](https://myriadrf.org/projects/limesdr/) and its smaller clone LimeSDR Mini are supported using LimeSuite library (see next).
 
-<p><b>&#9888; The plugins should work normally when running as single instances. Support of many Rx and/or Tx instances running concurrently is considered experimental. At least you should always have one of the streams running.</b></p>
+<p><b>&#9888; The latest version of LimeSuite is used and must be considered experimental. Hence LimeSDR support in SDRangel is also experimental.</b></p>
 
 <p>&#9888; It seems LimeSDR mini has trouble working with host sample rates lower than 2.5 MS/s particularly in Tx mode.</p>
 
diff --git a/devices/limesdr/devicelimesdr.cpp b/devices/limesdr/devicelimesdr.cpp
index 4e10cab52..25d42c359 100644
--- a/devices/limesdr/devicelimesdr.cpp
+++ b/devices/limesdr/devicelimesdr.cpp
@@ -50,7 +50,7 @@ bool DeviceLimeSDR::setNCOFrequency(lms_device_t *device, bool dir_tx, std::size
             return false;
         }
 
-        if (LMS_SetNCOIndex(device, dir_tx, chan, 0, positive) < 0)
+        if (LMS_SetNCOIndex(device, dir_tx, chan, 0, dir_tx^positive) < 0)
         {
             fprintf(stderr, "DeviceLimeSDR::setNCOFrequency: cannot set conversion direction %sfreq\n", positive ? "+" : "-");
             return false;