1 files changed, 2 insertions, 1 deletions
diff --git a/src/buf.c b/src/buf.c
index e5deb4e..a9284ce 100644
--- a/src/buf.c
+++ b/src/buf.c
@@ -90,7 +90,8 @@ struct Buf *buf_prints (struct Buf *buf, const char *fmt, const char *s)
  */
 struct Buf *buf_linedir (struct Buf *buf, const char* filename, int lineno)
 {
-    char *dst, *src, *t;
+    char *dst, *t;
+    const char* src;
 
     t = flex_alloc (strlen ("#line \"\"\n")          +   /* constant parts */
                     2 * strlen (filename)            +   /* filename with possibly all backslashes escaped */