diff --git a/crypto/base64/base64.c b/crypto/base64/base64.c
index a47cb15..1ddf094 100644
--- a/crypto/base64/base64.c
+++ b/crypto/base64/base64.c
@@ -327,7 +327,7 @@
         continue;
     }
 
-    if (base64_ascii_to_bin(c) == 0xff || ctx->eof_seen) {
+    if (ctx->eof_seen) {
       ctx->error_encountered = 1;
       return -1;
     }