diff --git a/sh_script/pre-build.sh b/sh_script/pre-build.sh
index d861495..21f37db 100755
--- a/sh_script/pre-build.sh
+++ b/sh_script/pre-build.sh
@@ -36,6 +36,11 @@ patch-webpki() {
     pushd external/webpki
     git reset --hard f84a538a5cd281ba1ffc0d54bbe5824cf5969703
     git clean -xdf
+
+    # apply the patch to get rid of unused import warning during compilation
+    # https://github.com/briansmith/webpki/commit/8f81719df5b47bda95f15a7655be811e52e12997
+    git cherry-pick 8f81719df5b47bda95f15a7655be811e52e12997
+
     git apply ../patches/webpki/0001-Add-support-for-verifying-certificate-chain-with-EKU.patch
     popd
 }