diff --git a/src/Geometries/PointCollection.php b/src/Geometries/PointCollection.php
index b0aed6f..3381aa9 100644
--- a/src/Geometries/PointCollection.php
+++ b/src/Geometries/PointCollection.php
@@ -65,7 +65,7 @@ public function insertPoint($index, Point $point)
             throw new InvalidArgumentException('$index is greater than the size of the array');
         }
 
-        array_splice($this->points, $offset, 0, [$point]);
+        array_splice($this->points, $index, 0, [$point]);
     }
 
     public function offsetExists($offset)