diff --git a/modules/nonfree/CMakeLists.txt b/modules/nonfree/CMakeLists.txt
index 55f6b410c..5689a12e3 100644
--- a/modules/nonfree/CMakeLists.txt
+++ b/modules/nonfree/CMakeLists.txt
@@ -3,4 +3,5 @@ if(BUILD_ANDROID_PACKAGE)
 endif()
 
 set(the_description "Functionality with possible limitations on the use")
+ocv_warnings_disable(CMAKE_CXX_FLAGS -Wundef)
 ocv_define_module(nonfree opencv_imgproc opencv_features2d opencv_calib3d OPTIONAL opencv_gpu opencv_ocl)
diff --git a/modules/softcascade/CMakeLists.txt b/modules/softcascade/CMakeLists.txt
index d558e8d29..84d098d79 100644
--- a/modules/softcascade/CMakeLists.txt
+++ b/modules/softcascade/CMakeLists.txt
@@ -1,3 +1,3 @@
 set(the_description "Soft Cascade detection and training")
-ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4310 -Wundef -Wsign-promo -Wmissing-declarations -Wmissing-prototypes)
+ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4310 -Wundef -Wmissing-declarations -Wmissing-prototypes)
 ocv_define_module(softcascade opencv_core opencv_imgproc opencv_ml)