diff --git a/DataStructures/SearchEngineData.h b/DataStructures/SearchEngineData.h
index 7946eddb2..5d3e68046 100644
--- a/DataStructures/SearchEngineData.h
+++ b/DataStructures/SearchEngineData.h
@@ -28,9 +28,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef SEARCH_ENGINE_DATA_H
 #define SEARCH_ENGINE_DATA_H
 
-#ifndef SEARCH_ENGINE_DATA_H
-#define SEARCH_ENGINE_DATA_H
-
 #include "BinaryHeap.h"
 #include "QueryEdge.h"
 #include "StaticGraph.h"