diff --git a/README.md b/README.md
index 69931f0..fb1e61e 100644
--- a/README.md
+++ b/README.md
@@ -42,7 +42,9 @@ cargo zigbuild --target aarch64-unknown-linux-gnu.2.17
 Known upstream zig issues:
 
 1. [cross-compiling to macOS with a dependency on iconv](https://github.com/ziglang/zig/issues/10485): We provide
-a bundled version of `libiconv.tbd` to zig for linking to make it work.
+   a bundled version of `libiconv.tbd` to zig for linking to make it work.
+2. [zig cc: parse `-target` and `-mcpu`/`-march`/`-mtune` flags according to clang](https://github.com/ziglang/zig/issues/4911):
+   Some Rust target isn't recognized by `zig cc`, for example `armv7-unknown-linux-gnueabihf`
 
 ## License