diff --git a/vlib/encoding/base64/base64.v b/vlib/encoding/base64/base64.v
index 603778952a..c3481cecad 100644
--- a/vlib/encoding/base64/base64.v
+++ b/vlib/encoding/base64/base64.v
@@ -11,9 +11,9 @@ const (
 	0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
 	17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 63, 0, 26, 27, 28, 29,
 	30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46,
-	47, 48, 49, 50, 51]
+	47, 48, 49, 50, 51]!!
 
-	ending_table = [0, 2, 1]
+	ending_table = [0, 2, 1]!!
 	enc_table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
 )