Index: src/ControlStruct/MLEMutator.h
===================================================================
--- src/ControlStruct/MLEMutator.h	(revision ca35c51743c5aa90ec6fd8bc56f12cfc866101ff)
+++ src/ControlStruct/MLEMutator.h	(revision 6a37d13df78628db4154171dbe8466281b284003)
@@ -34,12 +34,12 @@
 		~MLEMutator();
 
-		CompoundStmt *mutate( CompoundStmt *cmpndStmt );
-		Statement *mutate( WhileStmt *whileStmt );
-		Statement *mutate( ForStmt *forStmt );
-		Statement *mutate( BranchStmt *branchStmt ) throw ( SemanticError );
+		virtual CompoundStmt *mutate( CompoundStmt *cmpndStmt ) override;
+		virtual Statement *mutate( WhileStmt *whileStmt ) override;
+		virtual Statement *mutate( ForStmt *forStmt ) override;
+		virtual Statement *mutate( BranchStmt *branchStmt ) throw ( SemanticError ) override;
 
-		Statement *mutate( CaseStmt *caseStmt );
-		Statement *mutate( SwitchStmt *switchStmt );
-		Statement *mutate( ChooseStmt *switchStmt );
+		virtual Statement *mutate( CaseStmt *caseStmt ) override;
+		virtual Statement *mutate( SwitchStmt *switchStmt ) override;
+		virtual Statement *mutate( ChooseStmt *switchStmt ) override;
 
 		Statement *mutateLoop( Statement *bodyLoop, Entry &e );