diff --git a/src/Unittests/unittests_tutorials.cc b/src/Unittests/unittests_tutorials.cc
index af5546aa..01881b0f 100644
--- a/src/Unittests/unittests_tutorials.cc
+++ b/src/Unittests/unittests_tutorials.cc
@@ -21,7 +21,7 @@ struct MyData
   OpenMesh::Vec4f vec4fval;
 
   MyData()
-    : ival(0), dval(0.0), bval(false)
+    : ival(0), dval(0.0), bval(false), vec4fval(0.0,0.0,0.0,0.0)
   { }
 
   MyData( const MyData& _cpy )