diff --git a/org.fortiss.af3.exploration.alg/trunk/src/org/fortiss/af3/exploration/alg/dse/backend/ExplorerBackendBase.java b/org.fortiss.af3.exploration.alg/trunk/src/org/fortiss/af3/exploration/alg/dse/backend/ExplorerBackendBase.java
index b3e02eb058aaf427db2b9815d6da62772bfe0c11..674a738ccb52410742f499e83786fe527e6a2b20 100644
--- a/org.fortiss.af3.exploration.alg/trunk/src/org/fortiss/af3/exploration/alg/dse/backend/ExplorerBackendBase.java
+++ b/org.fortiss.af3.exploration.alg/trunk/src/org/fortiss/af3/exploration/alg/dse/backend/ExplorerBackendBase.java
@@ -169,7 +169,7 @@ public abstract class ExplorerBackendBase<O extends IOptimizer> implements IExpl
 
 	/**  */
 	protected <M extends Phenotype> boolean validateSolution(IExplorationSolution<?> solution,
-			ExplorationConstraint target, Value<?> value,
+			ExplorationConstraint<?> target, Value<?> value,
 			Collection<EvaluatorWrapper<?, ?, ?>> evalWrappers) {
 		EvaluatorWrapper<?, ?, ?> evalWrapper = getEvaluatorOf(target, evalWrappers);