1 files changed, 1 insertions, 1 deletions
diff --git a/roff.c b/roff.c
index 1e4b408e..f44fd6e2 100644
--- a/roff.c
+++ b/roff.c
@@ -1236,7 +1236,7 @@ roff_evalstrcond(const char *v, int *pos)
 out:
 	if (NULL == s3)
 		s3 = strchr(s2, '\0');
-	else
+	else if (*s3 != '\0')
 		s3++;
 	*pos = s3 - v;
 	return(match);