2 files changed, 5 insertions, 1 deletions
diff --git a/src/buf.c b/src/buf.c
index 2a423ef..f216b6d 100644
--- a/src/buf.c
+++ b/src/buf.c
@@ -95,6 +95,9 @@ struct Buf *buf_linedir (struct Buf *buf, const char* filename, int lineno)
     const char *src;
     size_t tsz;
 
+    if (gen_line_dirs)
+	return buf;
+
     tsz = strlen("#line \"\"\n")                +   /* constant parts */
                2 * strlen (filename)            +   /* filename with possibly all backslashes escaped */
                (int) (1 + log10 (abs (lineno))) +   /* line number */
diff --git a/src/main.c b/src/main.c
index fd06be4..e6ea2ab 100644
--- a/src/main.c
+++ b/src/main.c
@@ -496,7 +496,8 @@ void check_options (void)
     m4defs_buf.nelts = 0; /* memory leak here. */
 
     /* Place a bogus line directive, it will be fixed in the filter. */
-    outn("#line 0 \"M4_YY_OUTFILE_NAME\"\n");
+    if (gen_line_dirs)
+        outn("#line 0 \"M4_YY_OUTFILE_NAME\"\n");
 
 	/* Dump the user defined preproc directives. */
 	if (userdef_buf.elts)