diff --git a/modules/python/CMakeLists.txt b/modules/python/CMakeLists.txt
index 354c786cb3..0804fe1c08 100644
--- a/modules/python/CMakeLists.txt
+++ b/modules/python/CMakeLists.txt
@@ -97,6 +97,8 @@ if(MSVC AND NOT ENABLE_NOISY_WARNINGS)
   string(REPLACE "/W4" "/W3" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 endif()
 
+ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef) # accurate guard via #pragma doesn't work (C++ preprocessor doesn't handle #pragma)
+
 if(MSVC AND NOT BUILD_SHARED_LIBS)
   set_target_properties(${the_module} PROPERTIES LINK_FLAGS "/NODEFAULTLIB:atlthunk.lib /NODEFAULTLIB:atlsd.lib /DEBUG")
 endif()