1 files changed, 1 insertions, 1 deletions
diff --git a/base85.c b/base85.c
index f0b4956..8b57074 100644
--- a/base85.c
+++ b/base85.c
@@ -34,7 +34,7 @@ base85_encode_tab[] = {
   /* 80 */  '`', '{', '|', '}', '~',
   };
 
-static char const
+static signed char const
 base85_decode_tab[] = {
   /*   0 */  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
   /*  16 */  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,