diff --git a/libc/include/stdio.h b/libc/include/stdio.h
index fdf747d..fddad2f 100644
--- a/libc/include/stdio.h
+++ b/libc/include/stdio.h
@@ -494,7 +494,7 @@
 int sprintf(char *dest, const char *format, ...)
 {
     return __builtin___sprintf_chk(dest, 0,
-        __builtin_object_size(dest, 0), format, __builtin_va_arg_pack());
+        __bos(dest), format, __builtin_va_arg_pack());
 }
 
 extern char *__fgets_real(char *, int, FILE *)
diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h
index 1288b28..6d4abbd 100644
--- a/libc/include/sys/cdefs.h
+++ b/libc/include/sys/cdefs.h
@@ -518,9 +518,9 @@
 #if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0 && !defined(__clang__)
 #define __BIONIC_FORTIFY 1
 #if _FORTIFY_SOURCE == 2
-#define __bos(s) __builtin_object_size((s), 1);
+#define __bos(s) __builtin_object_size((s), 1)
 #else
-#define __bos(s) __builtin_object_size((s), 0);
+#define __bos(s) __builtin_object_size((s), 0)
 #endif
 
 #define __BIONIC_FORTIFY_INLINE \