diff --git a/src/pcu_l1_if.h b/src/pcu_l1_if.h
index d9d970d..9ab46a8 100644
--- a/src/pcu_l1_if.h
+++ b/src/pcu_l1_if.h
@@ -57,7 +57,8 @@
 	}
 
 	pcu_l1_meas_ts() :
-		have_ms_i_level(0)
+		have_ms_i_level(0),
+		ms_i_level(0)
 	{}
 #endif
 };