diff --git a/ParadisEO-GPU/src/eval/moCudaKswapEval.h b/ParadisEO-GPU/src/eval/moCudaKswapEval.h
index 98d643922..b03e0f26a 100644
--- a/ParadisEO-GPU/src/eval/moCudaKswapEval.h
+++ b/ParadisEO-GPU/src/eval/moCudaKswapEval.h
@@ -71,7 +71,7 @@ public:
 	 * @param _incrEval the incremental evaluation
 	 */
 
-	moCudaKswapEval(unsigned _neighborhoodSize, IncrementEval & _incrEval) :
+	moCudaKswapEval(unsigned int _neighborhoodSize, IncrementEval & _incrEval) :
 		moCudaEval<Neighbor> (_neighborhoodSize), incrEval(_incrEval) {
 	}