diff --git a/Makefile b/Makefile
index 88c9f66..8e78a09 100644
--- a/Makefile
+++ b/Makefile
@@ -62,6 +62,7 @@ build/llvm.BUILT:
 		-DLLVM_STATIC_LINK_CXX_STDLIB=ON \
 		-DLLVM_HAVE_LIBXAR=OFF \
 		-DCMAKE_OSX_ARCHITECTURES="arm64;x86_64" \
+		-DCMAKE_OSX_DEPLOYMENT_TARGET=11.0 \
 		-DCMAKE_INSTALL_PREFIX=$(PREFIX) \
 		-DLLVM_TARGETS_TO_BUILD=WebAssembly \
 		-DLLVM_DEFAULT_TARGET_TRIPLE=wasm32-wasi \