diff --git a/plugins/samplesource/bladerf/bladerfthread.cpp b/plugins/samplesource/bladerf/bladerfthread.cpp
index ab30ef351..eab70f4fe 100644
--- a/plugins/samplesource/bladerf/bladerfthread.cpp
+++ b/plugins/samplesource/bladerf/bladerfthread.cpp
@@ -192,8 +192,8 @@ void BladerfThread::decimate32(SampleVector::iterator* it, const qint16* buf, qi
 
 	for (int pos = 0; pos < len - 63; ) {
 		for (int i = 0; i < 8; i++) {
-			xreal[i] = (buf[pos+0] - buf[pos+3] + buf[pos+7] - buf[pos+4]) << 1;
-			yimag[i] = (buf[pos+1] - buf[pos+5] + buf[pos+2] - buf[pos+6]) << 1;
+			xreal[i] = (buf[pos+0] - buf[pos+3] + buf[pos+7] - buf[pos+4]) << 2;
+			yimag[i] = (buf[pos+1] - buf[pos+5] + buf[pos+2] - buf[pos+6]) << 2;
 			pos += 8;
 		}
 
diff --git a/plugins/samplesource/bladerf/bladerfthread.h b/plugins/samplesource/bladerf/bladerfthread.h
index a41e0a722..d5493d459 100644
--- a/plugins/samplesource/bladerf/bladerfthread.h
+++ b/plugins/samplesource/bladerf/bladerfthread.h
@@ -24,7 +24,7 @@
 #include "dsp/samplefifo.h"
 #include "dsp/inthalfbandfilter.h"
 
-#define BLADERF_BLOCKSIZE 16384
+#define BLADERF_BLOCKSIZE (1<<14)
 
 class BladerfThread : public QThread {
 	Q_OBJECT