Index: firmware/App/Services/Interrupts.c
===================================================================
diff -u -rf6c8ce1cc681f87467cdb4dc1685df74f39e2740 -r4dd3ecab3dfd82b339e4e8575e672b6dd88554e7
--- firmware/App/Services/Interrupts.c	(.../Interrupts.c)	(revision f6c8ce1cc681f87467cdb4dc1685df74f39e2740)
+++ firmware/App/Services/Interrupts.c	(.../Interrupts.c)	(revision 4dd3ecab3dfd82b339e4e8575e672b6dd88554e7)
@@ -240,7 +240,7 @@
                 clearSCI2DMATransmitInterrupt();
                 signalFPGATransmitCompleted();
                 break;
-
+#ifdef __TEENSY_CONDUCTIVITY_DRIVER__
             case DMA_CH1:  // Conductivity receive channel
                 clearSCIDMAReceiveInterrupt();
                 signalConductivityReceiptCompleted();
@@ -250,7 +250,7 @@
                 clearSCIDMATransmitInterrupt();
                 signalConductivityTransmitCompleted();
                 break;
-
+#endif
             default:
                 // TODO - ignore?
                 break;