diff --git a/src/DummyConnector.cpp b/src/DummyConnector.cpp
index 3bbe84a79285f6e261304df64a4dc4f77d3feb34..2c98451102bd27277a9972b8f91db828d99e9cc2 100644
--- a/src/DummyConnector.cpp
+++ b/src/DummyConnector.cpp
@@ -40,7 +40,7 @@ bool DummyConnector::reachableObject(const Object &robot, const Object &object)
     }
 
     // if the location is more than 750mm away from the robot base it is too far away
-    if (std::sqrt(dx*dx + dy*dy + dz+dz) > 0.75) {
+    if (std::sqrt(dx*dx + dy*dy + dz*dz) > 0.75) {
         return false;
     }