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-rw-r--r--ddb/db_lex.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/ddb/db_lex.h b/ddb/db_lex.h
index dc9da0a..5900122 100644
--- a/ddb/db_lex.h
+++ b/ddb/db_lex.h
@@ -31,6 +31,9 @@
* Lexical analyzer.
*/
+#ifndef _DDB_DB_LEX_H_
+#define _DDB_DB_LEX_H_
+
#define TOK_STRING_SIZE 64
#define DB_LEX_LINE_SIZE 256
@@ -92,3 +95,5 @@ extern db_expr_t db_radix;
#define tLOG_OR 31
#define tSTRING 32
#define tQUESTION 33
+
+#endif /* _DDB_DB_LEX_H_ */