diff --git a/JAERO/burstoqpskdemodulator.cpp b/JAERO/burstoqpskdemodulator.cpp
index 911cedf..dd0cdf3 100644
--- a/JAERO/burstoqpskdemodulator.cpp
+++ b/JAERO/burstoqpskdemodulator.cpp
@@ -293,7 +293,7 @@ qint64 BurstOqpskDemodulator::readData(char *data, qint64 maxlen)
 
 qint64 BurstOqpskDemodulator::writeData(const char *data, qint64 len)
 {
-    if(len<sizeof(short))return len;
+    if(len<((int)sizeof(short)))return len;
     if(channel_stereo)emit writeDataSignal(data,len);
     writeDataSlot(data,len);
     return len;
diff --git a/JAERO/oqpskdemodulator.cpp b/JAERO/oqpskdemodulator.cpp
index cce0d79..46af89e 100644
--- a/JAERO/oqpskdemodulator.cpp
+++ b/JAERO/oqpskdemodulator.cpp
@@ -250,7 +250,7 @@ qint64 OqpskDemodulator::writeData(const char *data, qint64 len)
     bool sendscatterpoints=false;
 
     const short *ptr = reinterpret_cast<const short *>(data);
-    for(int i=0;i<len/sizeof(short);i++)
+    for(int i=0;i<((int)(len/sizeof(short)));i++)
     {
         double dval=((double)(*ptr))/32768.0;