diff --git a/python/core/auto_generated/geometry/qgsgeometryutils.sip.in b/python/core/auto_generated/geometry/qgsgeometryutils.sip.in
index 319d054dc5f..7e3348a21d8 100644
--- a/python/core/auto_generated/geometry/qgsgeometryutils.sip.in
+++ b/python/core/auto_generated/geometry/qgsgeometryutils.sip.in
@@ -759,10 +759,11 @@ A Z dimension is added to ``point`` if one of the point in the list
 
     static bool setMValueFromPoints( const QgsPointSequence &points, QgsPoint &point );
 %Docstring
-A M dimension is added to ``point`` if one of the point in the list
-``points`` is in 3D. Moreover, the M value of ``point`` is updated with.
+A M dimension is added to ``point`` if one of the points in the list
+``points`` contains an M value. Moreover, the M value of ``point`` is
+updated with the first M value found in list ``points``.
 
-:param points: List of points in which a 3D point is searched.
+:param points: List of points in which a M point is searched.
 :param point: The point to update with M dimension and value.
 
 :return: ``True`` if the point is updated, ``False`` otherwise
diff --git a/src/core/geometry/qgsgeometryutils.h b/src/core/geometry/qgsgeometryutils.h
index fe319b9bf0e..3565e812677 100644
--- a/src/core/geometry/qgsgeometryutils.h
+++ b/src/core/geometry/qgsgeometryutils.h
@@ -781,10 +781,11 @@ class CORE_EXPORT QgsGeometryUtils
     static bool setZValueFromPoints( const QgsPointSequence &points, QgsPoint &point );
 
     /**
-     * A M dimension is added to \a point if one of the point in the list
-     * \a points is in 3D. Moreover, the M value of \a point is updated with.
+     * A M dimension is added to \a point if one of the points in the list
+     * \a points contains an M value. Moreover, the M value of \a point is
+     * updated with the first M value found in list \a points.
      *
-     * \param points List of points in which a 3D point is searched.
+     * \param points List of points in which a M point is searched.
      * \param point The point to update with M dimension and value.
      * \returns TRUE if the point is updated, FALSE otherwise
      *