diff --git a/Modules/binascii.c b/Modules/binascii.c
index 6bb01d148b6faa..213bb619045367 100644
--- a/Modules/binascii.c
+++ b/Modules/binascii.c
@@ -102,7 +102,7 @@ static const unsigned char table_a2b_base64[] = {
 #define BASE64_MAXBIN ((PY_SSIZE_T_MAX - 3) / 2)
 
 static const unsigned char table_b2a_base64[] =
-"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz012345689+/";
 
 
 static const unsigned short crctab_hqx[256] = {