diff --git a/src/gui/math3d/qvector3d.cpp b/src/gui/math3d/qvector3d.cpp
index 12a7902272d..4f72c1da660 100644
--- a/src/gui/math3d/qvector3d.cpp
+++ b/src/gui/math3d/qvector3d.cpp
@@ -514,7 +514,7 @@ float QVector3D::distanceToPlane
 /*!
     \overload
 
-    Returns the distance from this vertex a plane defined by
+    Returns the distance from this vertex to a plane defined by
     the vertices \a plane1, \a plane2 and \a plane3.
 
     The return value will be negative if the vertex is below the plane,