diff --git a/src/libc/ctype.c b/src/libc/ctype.c
index d97d87f8..222b4509 100644
--- a/src/libc/ctype.c
+++ b/src/libc/ctype.c
@@ -60,7 +60,7 @@ bfdev_ctype_table[256] = {
     ['.' ] = BFDEV_CTYPE_ASCII | BFDEV_CTYPE_PUNCT,
     ['/' ] = BFDEV_CTYPE_ASCII | BFDEV_CTYPE_PUNCT,
 
-    ['0'] = BFDEV_CTYPE_ASCII | BFDEV_CTYPE_DIGIT,
+    ['0'] = BFDEV_CTYPE_ASCII | BFDEV_CTYPE_DIGIT | BFDEV_CTYPE_HEXDG,
     ['1'] = BFDEV_CTYPE_ASCII | BFDEV_CTYPE_DIGIT | BFDEV_CTYPE_HEXDG,
     ['2'] = BFDEV_CTYPE_ASCII | BFDEV_CTYPE_DIGIT | BFDEV_CTYPE_HEXDG,
     ['3'] = BFDEV_CTYPE_ASCII | BFDEV_CTYPE_DIGIT | BFDEV_CTYPE_HEXDG,