diff --git a/compact_enc_det/compact_enc_det.cc b/compact_enc_det/compact_enc_det.cc
index fcac75a9..30317710 100644
--- a/compact_enc_det/compact_enc_det.cc
+++ b/compact_enc_det/compact_enc_det.cc
@@ -2469,7 +2469,7 @@ bool GoodUnicodeFromBase64(const uint8* start, const uint8* limit) {
       ++lower_count;
     } else if (('A' <= c) && (c <= 'Z')) {
       ++upper_count;
-    } else if (('0' <= c) && (c <= '0')) {
+    } else if (('0' <= c) && (c <= '9')) {
       ++digit_count;
     } else if (*src == '+') {
       ++plus_count;