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-rw-r--r--buffer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/buffer.c b/buffer.c
index e66c6a4..64307ef 100644
--- a/buffer.c
+++ b/buffer.c
@@ -637,7 +637,7 @@ np (const char *str)
*/
bool
-char_class (const char c, const unsigned int flags)
+char_class (const unsigned char c, const unsigned int flags)
{
if (!flags)
return false;