diff --git a/panda/src/parametrics/curveFitter.cxx b/panda/src/parametrics/curveFitter.cxx
index a41e430b98..62724bfea6 100644
--- a/panda/src/parametrics/curveFitter.cxx
+++ b/panda/src/parametrics/curveFitter.cxx
@@ -169,7 +169,7 @@ sample(ParametricCurve *curve, int count, bool even) {
   }
 
   if (even) {
-    double scale = max_t / last_t;
+    double scale = max_t / d;
     while (n < _data.size()) {
       _data[n]._t *= scale;
       n++;