diff --git a/build-mingw-w64.sh b/build-mingw-w64.sh
index ac1e508..8126cb1 100755
--- a/build-mingw-w64.sh
+++ b/build-mingw-w64.sh
@@ -30,7 +30,7 @@ if [ -z "$NOHEADERS" ]; then
         mkdir -p build-$arch
         cd build-$arch
         ../configure --host=$arch-w64-mingw32 --prefix=$PREFIX/$arch-w64-mingw32 \
-            --enable-secure-api --enable-idl --with-default-win32-winnt=0x600
+            --enable-secure-api --enable-idl --with-default-win32-winnt=0x600 --with-default-msvcrt=ucrtbase
         make install
         cd ..
     done
@@ -55,6 +55,7 @@ for arch in $ARCHS; do
         FLAGS="--disable-lib32 --enable-lib64"
         ;;
     esac
+    FLAGS="$FLAGS --with-default-msvcrt=ucrtbase"
     CC=$arch-w64-mingw32-clang AR=llvm-ar RANLIB=llvm-ranlib DLLTOOL=llvm-dlltool \
     ../configure --host=$arch-w64-mingw32 --prefix=$PREFIX/$arch-w64-mingw32 $FLAGS
     make -j$CORES