diff --git a/src/DataVampire.h b/src/DataVampire.h
index 986b13e1f3f1f69a47fca92d8bb22a439f29772c..678fbb5097f417a3f0b483bffe6d09eb8847a44a 100644
--- a/src/DataVampire.h
+++ b/src/DataVampire.h
@@ -88,7 +88,7 @@ public:
 		double verposstd;
 		double validvalues;
 	};
-	int array_idx = 0;
+	int array_idx;
 	acq_array_t acq_array[DATAVAMPIRE_MAX_SIZE];
 
 	Tango::DeviceProxy *device, *bn_device;