X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/puzzles/blobdiff_plain/1ad942e7feb35231f8642f26a5fb238c68d937d4..89167dad22e50900de4d820f8bbba67bd1a308c7:/cube.c

diff --git a/cube.c b/cube.c
index c1462e7..e271ce3 100644
--- a/cube.c
+++ b/cube.c
@@ -285,7 +285,7 @@ static void decode_params(game_params *ret, char const *string)
       default: break;
     }
     ret->d1 = ret->d2 = atoi(string);
-    while (*string && isdigit(*string)) string++;
+    while (*string && isdigit((unsigned char)*string)) string++;
     if (*string == 'x') {
         string++;
         ret->d2 = atoi(string);