diff --git a/src/Waypoint.cc b/src/Waypoint.cc
index 0d1f876ee3ac415e5fb8c42ea96dc9a0819e4139..de5c262f45fbd1cde840433d23ada8b0079ba762 100644
--- a/src/Waypoint.cc
+++ b/src/Waypoint.cc
@@ -283,9 +283,9 @@ void Waypoint::setParam5(double param5)
 
 void Waypoint::setParam6(double param6)
 {
-    if (this->z != param6)
+    if (this->y != param6)
     {
-        this->z = param6;
+        this->y = param6;
         emit changed(this);
     }
 }