diff --git a/tccpp.c b/tccpp.c
index 96385f5f..cd1ed9cc 100644
--- a/tccpp.c
+++ b/tccpp.c
@@ -3737,6 +3737,7 @@ static void tcc_predefs(TCCState *s1, CString *cs, int is_asm)
     cstr_printf(cs, "#define __SIZEOF_LONG__ %d\n", LONG_SIZE);
     if (!is_asm) {
       putdef(cs, "__STDC__");
+      cstr_printf(cs, "#define __STDC_HOSTED__ %d\n", s1->nostdlib ? 0 : 1);
       cstr_printf(cs, "#define __STDC_VERSION__ %dL\n", s1->cversion);
       cstr_cat(cs,
         /* load more predefs and __builtins */