diff --git a/Core/Computation/DWBASingleComputation.h b/Core/Computation/DWBASingleComputation.h
index df36330adae3845fb6dd77cf1ec0ac05ea647acd..f1992d7b785e73daa05f1d009851c9617e232afd 100644
--- a/Core/Computation/DWBASingleComputation.h
+++ b/Core/Computation/DWBASingleComputation.h
@@ -20,11 +20,9 @@
 #ifndef BORNAGAIN_CORE_COMPUTATION_DWBASINGLECOMPUTATION_H
 #define BORNAGAIN_CORE_COMPUTATION_DWBASINGLECOMPUTATION_H
 
-#include <map>
 #include <memory>
 #include <vector>
 
-struct HomogeneousRegion;
 class DelayedProgressCounter;
 class GISASSpecularComputation;
 class IFresnelMap;