diff --git a/doc/core_classes.xml b/doc/core_classes.xml
index 02b46ac4b9..c37b50f122 100644
--- a/doc/core_classes.xml
+++ b/doc/core_classes.xml
@@ -575,8 +575,8 @@
3x3 Matrix.
-
Matrix represent a 3x3 (3 rows by 3 columns) transformation matrix. it is used mainly to represent and accumulate transformations such as rotation or scale when used as an OCS (oriented coordinate system).
+
@@ -937,8 +937,8 @@
Vector used for 2D Math.
-
Vector class, which performs basic 2D vector math operations.
+