diff --git a/src/BRepExtrema/BRepExtrema_MapOfIntegerPackedMapOfInteger.hxx b/src/BRepExtrema/BRepExtrema_MapOfIntegerPackedMapOfInteger.hxx
index 47e8c24f4e..f7d734c1f6 100644
--- a/src/BRepExtrema/BRepExtrema_MapOfIntegerPackedMapOfInteger.hxx
+++ b/src/BRepExtrema/BRepExtrema_MapOfIntegerPackedMapOfInteger.hxx
@@ -13,8 +13,13 @@
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
+#ifndef _BRepExtrema_MapOfIntegerPackedMapOfInteger_HeaderFile
+#define _BRepExtrema_MapOfIntegerPackedMapOfInteger_HeaderFile
+
 #include <NCollection_DataMap.hxx>
 #include <TColStd_PackedMapOfInteger.hxx>
 
 //! Set of overlapped sub-shapes.
-typedef NCollection_DataMap<Standard_Integer, TColStd_PackedMapOfInteger> BRepExtrema_MapOfIntegerPackedMapOfInteger;
\ No newline at end of file
+typedef NCollection_DataMap<Standard_Integer, TColStd_PackedMapOfInteger> BRepExtrema_MapOfIntegerPackedMapOfInteger;
+
+#endif // _BRepExtrema_MapOfIntegerPackedMapOfInteger_HeaderFile