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-rw-r--r--chilbert/GrayCodeRank.hpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/chilbert/GrayCodeRank.hpp b/chilbert/GrayCodeRank.hpp
index 13c169c..494caf6 100644
--- a/chilbert/GrayCodeRank.hpp
+++ b/chilbert/GrayCodeRank.hpp
@@ -16,8 +16,8 @@
this program. If not, see <https://www.gnu.org/licenses/>.
*/
-#ifndef _GRAYCODERANK_HPP_
-#define _GRAYCODERANK_HPP_
+#ifndef CHILBERT_GRAYCODERANK_HPP
+#define CHILBERT_GRAYCODERANK_HPP
#include "chilbert/BigBitVec.hpp"