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-rw-r--r--source4/heimdal/lib/hx509/sel-lex.l4
1 files changed, 4 insertions, 0 deletions
diff --git a/source4/heimdal/lib/hx509/sel-lex.l b/source4/heimdal/lib/hx509/sel-lex.l
index e9bbbc6087..4c9396750a 100644
--- a/source4/heimdal/lib/hx509/sel-lex.l
+++ b/source4/heimdal/lib/hx509/sel-lex.l
@@ -53,6 +53,10 @@ static int lex_input(char *, int);
struct hx_expr_input _hx509_expr_input;
+#ifndef YY_NULL
+#define YY_NULL 0
+#endif
+
#define YY_NO_UNPUT 1
#undef YY_INPUT