diff --git a/plugins/samplesource/limesdrinput/limesdrinput.cpp b/plugins/samplesource/limesdrinput/limesdrinput.cpp
index bda8df300..44a67ef3b 100644
--- a/plugins/samplesource/limesdrinput/limesdrinput.cpp
+++ b/plugins/samplesource/limesdrinput/limesdrinput.cpp
@@ -175,7 +175,7 @@ bool LimeSDRInput::openDevice()
     // set up the stream
 
     m_streamId.channel =  m_deviceShared.m_channel; //channel number
-    m_streamId.fifoSize = 1024 * 128;               //fifo size in samples
+    m_streamId.fifoSize = 1024 * 1024;              //fifo size in samples
     m_streamId.throughputVsLatency = 1.0;           //optimize for max throughput
     m_streamId.isTx = false;                        //RX channel
     m_streamId.dataFmt = lms_stream_t::LMS_FMT_I12; //12-bit integers
diff --git a/plugins/samplesource/limesdrinput/limesdrinputthread.h b/plugins/samplesource/limesdrinput/limesdrinputthread.h
index 8237b5ca9..a0da4fabe 100644
--- a/plugins/samplesource/limesdrinput/limesdrinputthread.h
+++ b/plugins/samplesource/limesdrinput/limesdrinputthread.h
@@ -27,7 +27,7 @@
 #include "dsp/decimators.h"
 #include "limesdr/devicelimesdrshared.h"
 
-#define LIMESDR_BLOCKSIZE (1<<14) //complex samples per buffer ~10k (16k)
+#define LIMESDR_BLOCKSIZE (1<<15) //complex samples per buffer
 
 class LimeSDRInputThread : public QThread, public DeviceLimeSDRShared::ThreadInterface
 {