diff --git a/src-self-hosted/c.zig b/src-self-hosted/c.zig
index 08060fbe3aaab89b354568cae171b7f514c5996a..3912462985f7c6b0d8f2061c4eaca143c36a88fc 100644
--- a/src-self-hosted/c.zig
+++ b/src-self-hosted/c.zig
@@ -1,4 +1,6 @@
 pub use @cImport({
+    @cDefine("__STDC_CONSTANT_MACROS", "");
+    @cDefine("__STDC_LIMIT_MACROS", "");
     @cInclude("inttypes.h");
     @cInclude("config.h");
     @cInclude("zig_llvm.h");