diff --git a/Dockerfile b/Dockerfile
index 0d0ece7..07c303c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -221,6 +221,7 @@ RUN cd libcxx && \
             -DCMAKE_CXX_COMPILER_WORKS=TRUE \
             -DCMAKE_AR=$TOOLCHAIN_PREFIX/bin/$AR \
             -DCMAKE_RANLIB=$TOOLCHAIN_PREFIX/bin/$RANLIB \
+            -DLIBCXX_USE_COMPILER_RT=ON \
             -DLIBCXX_INSTALL_HEADERS=ON \
             -DLIBCXX_ENABLE_EXCEPTIONS=$EXCEPTIONS \
             -DLIBCXX_ENABLE_THREADS=OFF \