1 files changed, 1 insertions, 1 deletions
diff --git a/rfc822.c b/rfc822.c
index 24e3560c..6f2dbf30 100644
--- a/rfc822.c
+++ b/rfc822.c
@@ -41,7 +41,7 @@ const char *program_name = "rfc822";
 
 #define HEADER_END(p)	((p)[0] == '\n' && ((p)[1] != ' ' && (p)[1] != '\t'))
 
-#define BEFORE_EOL(s)	strcspn((s), "\r\n"))
+#define BEFORE_EOL(s)	(strcspn((s), "\r\n"))
 
 char *reply_hack(
 	char *buf		/* header to be hacked */,