diff --git a/eo/tutorial/Templates/mutation.tmpl b/eo/tutorial/Templates/mutation.tmpl
index 2b66be2c..befbcea9 100644
--- a/eo/tutorial/Templates/mutation.tmpl
+++ b/eo/tutorial/Templates/mutation.tmpl
@@ -46,15 +46,16 @@ public:
    */
   bool operator()(GenotypeT & _genotype) 
   {
+    bool isModified;
     // START code for mutation of the _genotype object
 
        /** Requirement
-	* if _genotype has been modified
-	*     return true;
-	* otherwise
-	*     return false;
+	* if (_genotype has been modified)
+	*     isModified = true;
+	* else
+	*     isModified = false;
 	*/
-
+    return isModified;
     // END code for mutation of the _genotype object
   }
 
diff --git a/eo/tutorial/Templates/quadCrossover.tmpl b/eo/tutorial/Templates/quadCrossover.tmpl
index 35554312..13145004 100644
--- a/eo/tutorial/Templates/quadCrossover.tmpl
+++ b/eo/tutorial/Templates/quadCrossover.tmpl
@@ -48,15 +48,16 @@ public:
    */
   bool operator()(GenotypeT& _genotype1, GenotypeT & _genotype2) 
   {
+    bool oneAtLeastIsModified;
     // START code for crossover of _genotype1 and _genotype2 objects
 
        /** Requirement
-	* if at least one genotype has been modified - no way to distinguish
-	*     return true;
-	* otherwise
-	*     return false;
+	* if (at least one genotype has been modified) // no way to distinguish
+	*     oneAtLeastIsModified = true;
+	* else
+	*     oneAtLeastIsModified = false;
 	*/
-
+    return oneAtLeastIsModified;
     // END code for crossover of _genotype1 and _genotype2 objects
   }