diff --git a/cad/opencascade/Makefile b/cad/opencascade/Makefile
index 230be0ca1d87..b70ea8552874 100644
--- a/cad/opencascade/Makefile
+++ b/cad/opencascade/Makefile
@@ -109,8 +109,6 @@ pre-everything::
 	@${ECHO_MSG} "Warning: to build OpenCascade, you should have at least"
 	@${ECHO_MSG} "2.6 Gb of free disk space in build area!"
 	@${ECHO_MSG}
-	@${ECHO_MSG} "Warning: OpenCascade must be deinstalled before rebuilding it!"
-	@${ECHO_MSG}
 
 pre-patch:
 	${REINPLACE_CMD} 's|<malloc.h>|<stdlib.h>|' \
diff --git a/cad/opencascade/files/patch-CMakeLists.txt b/cad/opencascade/files/patch-CMakeLists.txt
index 81f4730e6b3a..13c1041350e0 100644
--- a/cad/opencascade/files/patch-CMakeLists.txt
+++ b/cad/opencascade/files/patch-CMakeLists.txt
@@ -1,6 +1,6 @@
---- CMakeLists.txt.orig	2017-08-30 13:27:56 UTC
+--- CMakeLists.txt.orig	2020-11-03 14:49:47 UTC
 +++ CMakeLists.txt
-@@ -847,7 +847,7 @@ if (${DRAWEXE_INDEX} GREATER -1)
+@@ -893,7 +893,7 @@ if (${DRAWEXE_INDEX} GREATER -1)
              PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_WRITE GROUP_EXECUTE WORLD_READ WORLD_WRITE WORLD_EXECUTE)
    else()
      install (FILES "${CMAKE_SOURCE_DIR}/adm/templates/draw.${SCRIPT_EXT}" DESTINATION  "${INSTALL_DIR_SCRIPT}"
@@ -9,7 +9,16 @@
    endif()
  
    # copy draw script to CMake binary folder
-@@ -1056,7 +1056,13 @@ foreach (OCCT_CONFIGURATION ${CMAKE_CONF
+@@ -909,7 +909,7 @@ else()
+ endif()
+ 
+  # change custom.bat/sh
+-if (EXISTS "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}")
++if (FALSE)
+   file (READ "${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}/custom.${SCRIPT_EXT}" CUSTOM_CONTENT)
+ 
+   set (CUSTOM_CONTENT "${CUSTOM_CONTENT} ${ADDITIONAL_CUSTOM_CONTENT}")
+@@ -1156,7 +1156,13 @@ foreach (OCCT_CONFIGURATION ${CMAKE_CONFIGURATION_TYPE
  endforeach()
  # install OpenCASCADE config file with compile definitions and C/C++ flags ONLY for current configuration
  install (CODE "string (TOLOWER \"\${CMAKE_INSTALL_CONFIG_NAME}\" CMAKE_INSTALL_CONFIG_NAME_LOWER)")
diff --git a/cad/opencascade/pkg-plist b/cad/opencascade/pkg-plist
index 545dce246c7c..1cdcf970e315 100644
--- a/cad/opencascade/pkg-plist
+++ b/cad/opencascade/pkg-plist
@@ -28237,6 +28237,7 @@ lib/libTKernel.so.%%VER%%
 %%DOXYGEN%%%%DOCSDIR%%/html/documentation_test_image.svg
 %%DOXYGEN%%%%DOCSDIR%%/html/doxygen.css
 %%DOXYGEN%%%%DOCSDIR%%/html/doxygen.png
+%%DOXYGEN%%%%DOCSDIR%%/html/doxygen.svg
 %%DOXYGEN%%%%DOCSDIR%%/html/draw_image001.png
 %%DOXYGEN%%%%DOCSDIR%%/html/draw_image002.png
 %%DOXYGEN%%%%DOCSDIR%%/html/draw_image003.png
@@ -28395,6 +28396,7 @@ lib/libTKernel.so.%%VER%%
 %%DOXYGEN%%%%DOCSDIR%%/html/navtree.js
 %%DOXYGEN%%%%DOCSDIR%%/html/navtreedata.js
 %%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex0.js
+%%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex10.js
 %%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex1.js
 %%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex2.js
 %%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex3.js
@@ -28403,6 +28405,7 @@ lib/libTKernel.so.%%VER%%
 %%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex6.js
 %%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex7.js
 %%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex8.js
+%%DOXYGEN%%%%DOCSDIR%%/html/navtreeindex9.js
 %%DOXYGEN%%%%DOCSDIR%%/html/ocaf_functionmechanism_wp_image003.png
 %%DOXYGEN%%%%DOCSDIR%%/html/ocaf_functionmechanism_wp_image005.png
 %%DOXYGEN%%%%DOCSDIR%%/html/ocaf_image003.svg