diff --git a/src/opt/mpi/include/rarray.cc.h b/src/opt/mpi/include/rarray.cc.h
index d154346..b1383c4 100644
--- a/src/opt/mpi/include/rarray.cc.h
+++ b/src/opt/mpi/include/rarray.cc.h
@@ -48,9 +48,9 @@ namespace CNORXZ
 	{}
 
 	template <typename T>
-	template <class IndexI, class IndexK>
-	RCArray<T>::RCArray(const Sptr<RRange<IndexI,IndexK>>& range) :
-	    mA(std::make_unique<T>(range->local())),
+	template <class RangeI, class RangeK>
+	RCArray<T>::RCArray(const Sptr<RRange<RangeI,RangeK>>& range) :
+	    mA(std::make_unique<MArray<T>>(range->local())),
 	    mGeom(range->geom()),
 	    mGlobal(range)
 	{}
diff --git a/src/opt/mpi/include/rarray.h b/src/opt/mpi/include/rarray.h
index 20b0eb7..1390d82 100644
--- a/src/opt/mpi/include/rarray.h
+++ b/src/opt/mpi/include/rarray.h
@@ -37,8 +37,8 @@ namespace CNORXZ
 	    /** Construct from a rank range.
 		@param range The range.
 	     */
-	    template <class IndexI, class IndexK>
-	    RCArray(const Sptr<RRange<IndexI,IndexK>>& range);
+	    template <class RangeI, class RangeK>
+	    RCArray(const Sptr<RRange<RangeI,RangeK>>& range);
 	    
 	    /** Construct from local array object.
 		@param a Local array.