diff --git a/ports/sundials/portfile.cmake b/ports/sundials/portfile.cmake
index 52c7ca4a18..6798f02727 100644
--- a/ports/sundials/portfile.cmake
+++ b/ports/sundials/portfile.cmake
@@ -10,6 +10,12 @@ vcpkg_download_distfile(ARCHIVE_FILE
 )
 vcpkg_extract_source_archive(${ARCHIVE_FILE})
 
+vcpkg_apply_patches(
+    SOURCE_PATH ${SOURCE_PATH}
+    PATCHES
+    ${CMAKE_CURRENT_LIST_DIR}/uwp-c4703-warning.patch
+)
+
 vcpkg_configure_cmake(
     SOURCE_PATH ${SOURCE_PATH}
     OPTIONS -DEXAMPLES_ENABLE=OFF
diff --git a/ports/sundials/uwp-c4703-warning.patch b/ports/sundials/uwp-c4703-warning.patch
new file mode 100644
index 0000000000..3718753cfb
--- /dev/null
+++ b/ports/sundials/uwp-c4703-warning.patch
@@ -0,0 +1,12 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 4030f4d..afef556 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -602,6 +602,7 @@ MARK_AS_ADVANCED(FORCE SUNDIALS_DEVTESTS)
+ 
+ IF(WIN32)
+   ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS)
++  ADD_COMPILE_OPTIONS(/wd4703) # Needed for uwp
+ ENDIF(WIN32)
+ 
+ IF(APPLE)