diff --git a/common/lib/hist.cpp b/common/lib/hist.cpp
index 6e8c36a2d..4f0727a6b 100644
--- a/common/lib/hist.cpp
+++ b/common/lib/hist.cpp
@@ -37,11 +37,11 @@ namespace villas {
 
 Hist::Hist(int buckets, Hist::cnt_t wu) :
 	resolution(0),
-	high(),
-	low(),
+	high(0),
+	low(0),
 	highest(std::numeric_limits<double>::min()),
 	lowest(std::numeric_limits<double>::max()),
-	last(),
+	last(0),
 	total(0),
 	warmup(wu),
 	higher(0),