diff --git a/Makefile b/Makefile
index 3a9b16f..1caa79e 100644
--- a/Makefile
+++ b/Makefile
@@ -68,6 +68,7 @@ build/compiler-rt.BUILT: build/llvm.BUILT
 		-DCOMPILER_RT_HAS_FPIC_FLAG=OFF \
 		-DCOMPILER_RT_ENABLE_IOS=OFF \
 		-DCOMPILER_RT_DEFAULT_TARGET_ONLY=On \
+		-DCOMPILER_RT_EXCLUDE_ATOMIC_BUILTIN=OFF \
 		-DWASI_SDK_PREFIX=$(PREFIX) \
 		-DCMAKE_C_FLAGS="-O1 $(DEBUG_PREFIX_MAP)" \
 		-DLLVM_CONFIG_PATH=$(ROOT_DIR)/build/llvm/bin/llvm-config \