diff --git a/ctype/isASCII.cpp b/ctype/isASCII.cpp
index f049e70..5af0492 100644
--- a/ctype/isASCII.cpp
+++ b/ctype/isASCII.cpp
@@ -1,6 +1,5 @@
 #include <ctype.h>
 #include "_ctype.h"
 extern "C" isascii(int c) {
-    assert(c<256);
     return c >= 0 && c < 128;
 }
\ No newline at end of file