1 files changed, 3 insertions, 3 deletions
diff --git a/src/expr.h b/src/expr.h
index b3806bc1..dfbeefa1 100644
--- a/src/expr.h
+++ b/src/expr.h
@@ -39,8 +39,8 @@
  *
  * @ingroup expr
  */
-#ifndef _EXPR_H
-#define _EXPR_H
+#ifndef INCLUDED_EXPR_H
+#define INCLUDED_EXPR_H
 
 #include "exprbase.h"
 #include "value.h"
@@ -185,4 +185,4 @@ value_t source_command(call_scope_t& scope);
 
 } // namespace ledger
 
-#endif // _EXPR_H
+#endif // INCLUDED_EXPR_H