diff --git a/source/poodinis/factory.d b/source/poodinis/factory.d
index 42fd2fa..a39eb3f 100644
--- a/source/poodinis/factory.d
+++ b/source/poodinis/factory.d
@@ -49,7 +49,7 @@ class InstanceFactory {
 			this.instance = factoryParameters.existingInstance;
 		}
 
-		this.factoryParameters = factoryParameters;
+		_factoryParameters = factoryParameters;
 	}
 
 	public @property InstanceFactoryParameters factoryParameters() {