diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/Compound/compounddriver.cpp b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/Compound/compounddriver.cpp
index 1bafc01..8311035 100644
--- a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/Compound/compounddriver.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/Compound/compounddriver.cpp
@@ -13,6 +13,7 @@
 CompoundDriver::CompoundDriver()
 {
     connected = false;
+    SApoints = 0;
 
     drivers.push_back(new LibreVNAUSBDriver);
     drivers.push_back(new LibreVNATCPDriver);