diff --git a/src/bindings/mono/eolian_mono/meson.build b/src/bindings/mono/eolian_mono/meson.build
index 530a503647..3277ff645c 100644
--- a/src/bindings/mono/eolian_mono/meson.build
+++ b/src/bindings/mono/eolian_mono/meson.build
@@ -1,3 +1,7 @@
+cmake = import('cmake')
+opt_var = cmake.subproject_options()
+opt_var.set_override_option('cpp_std', 'c++17')
+
 inc_dir = include_directories(join_paths('..', '..', '..', 'bin', 'eolian_mono'))
 
 eolian_mono_gen_bin = executable('eolian_mono',
diff --git a/src/lib/efl_mono/efl_custom_exports_mono.c b/src/lib/efl_mono/efl_custom_exports_mono.c
index 7b10c79cd6..d99de6ea6b 100644
--- a/src/lib/efl_mono/efl_custom_exports_mono.c
+++ b/src/lib/efl_mono/efl_custom_exports_mono.c
@@ -13,6 +13,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+#ifdef _WIN32
+# include "evil_private.h" /* setenv */
+#endif
+
 #include "Eo.h"
 #include "Eina.h"
 #include "Ecore.h"