diff --git a/Desktop_Interface/isodriver.cpp b/Desktop_Interface/isodriver.cpp
index 6841c58b..361a65c1 100644
--- a/Desktop_Interface/isodriver.cpp
+++ b/Desktop_Interface/isodriver.cpp
@@ -10,7 +10,7 @@ isoDriver::isoDriver(QWidget *parent) : QLabel(parent)
 {
     this->hide();
     internalBuffer375_CH1 = new isoBuffer(this, MAX_WINDOW_SIZE*ADC_SPS/20*21, this, 1);
-    internalBuffer375_CH2 = new isoBuffer(this, MAX_WINDOW_SIZE*ADC_SPS/20*21, this, 1);
+    internalBuffer375_CH2 = new isoBuffer(this, MAX_WINDOW_SIZE*ADC_SPS/20*21, this, 2);
     internalBuffer750 = new isoBuffer(this, MAX_WINDOW_SIZE*ADC_SPS/10*21, this, 1);
 
     isoTemp = (char *) malloc(TIMER_PERIOD*ADC_SPF + 8); //8-byte header contains (unsigned long) length