diff --git a/cmake/compilers/setupGNU.cmake b/cmake/compilers/setupGNU.cmake
index c81d8d6e7..ac9a8f540 100644
--- a/cmake/compilers/setupGNU.cmake
+++ b/cmake/compilers/setupGNU.cmake
@@ -42,8 +42,4 @@ if (CMAKE_Fortran_COMPILER_ID MATCHES "GNU")
 endif()
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++98")
-    if(WIN32)
-      # MinGW automatically adds -ansi, so c++ code does not compile without this flag as well..
-      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -U__STRICT_ANSI__")
-    endif()
 endif()
diff --git a/src/mad_port.h b/src/mad_port.h
index be9d34e6f..3dfebeafa 100644
--- a/src/mad_port.h
+++ b/src/mad_port.h
@@ -9,6 +9,8 @@
 #ifdef __MINGW32__
 // problem with unistd compliance on Cygwin
 typedef long long off64_t;
+// For Windows _mkdir
+#include <direct.h>
 #endif
 
 #ifdef _WIN32