Fix

Author: njacazio

Common/Core/CollisionTypeHelper.cxx

@@ -17,6 +17,7 @@
 
 #include "Common/Core/CollisionTypeHelper.h"
 
+#include <string>
 #include <fairlogger/Logger.h>
 
 #include "DataFormatsParameters/GRPLHCIFData.h"

Common/Core/CollisionTypeHelper.h

@@ -15,8 +15,16 @@
 /// \brief  Utility to handle the collision type from the GRP information
 ///
 
+#ifndef COMMON_CORE_COLLISIONTYPEHELPER_H_
+#define COMMON_CORE_COLLISIONTYPEHELPER_H_
+
 #include "DataFormatsParameters/GRPLHCIFData.h"
 
+namespace o2::parameters
+{
+class GRPLHCIFData;
+} // namespace o2::parameters
+
 // Container for the collision system type
 struct CollisionSystemType {
   // Enum type for the collision system
@@ -32,4 +40,6 @@ struct CollisionSystemType {
   static std::string getCollisionSystemName(collType collSys);
 
   static int getCollisionTypeFromGrp(o2::parameters::GRPLHCIFData* grplhcif);
-};
+};
+
+#endif // COMMON_CORE_COLLISIONTYPEHELPER_H_