1 files changed, 1 insertions, 1 deletions
diff --git a/options.c b/options.c
index 3295c48..94da98e 100644
--- a/options.c
+++ b/options.c
@@ -2554,7 +2554,7 @@ positive_atoi (const char *str)
 }
 
 static inline bool
-space (char c)
+space (unsigned char c)
 {
   return c == '\0' || isspace (c);
 }