diff --git a/modules/python/common.cmake b/modules/python/common.cmake
index 28a3d9cd15..6a9696317c 100644
--- a/modules/python/common.cmake
+++ b/modules/python/common.cmake
@@ -118,6 +118,7 @@ if(MSVC AND NOT ENABLE_NOISY_WARNINGS)
 endif()
 
 ocv_warnings_disable(CMAKE_CXX_FLAGS -Woverloaded-virtual -Wunused-private-field)
+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")