diff --git a/src/db/db/dbTriangles.cc b/src/db/db/dbTriangles.cc
index 69d7c324e..f0cd8c80c 100644
--- a/src/db/db/dbTriangles.cc
+++ b/src/db/db/dbTriangles.cc
@@ -37,7 +37,7 @@ namespace db
 {
 
 Triangles::Triangles ()
-  : m_is_constrained (false), m_level (0), m_flips (0), m_hops (0)
+  : m_is_constrained (false), m_level (0), m_id (0), m_flips (0), m_hops (0)
 {
   //  .. nothing yet ..
 }
@@ -1414,8 +1414,8 @@ Triangles::remove_outside_triangles ()
 void
 Triangles::clear ()
 {
-  m_edges_heap.clear ();
   mp_triangles.clear ();
+  m_edges_heap.clear ();
   m_vertex_heap.clear ();
   m_returned_edges.clear ();
   m_is_constrained = false;
diff --git a/src/db/unit_tests/dbTrianglesTests.cc b/src/db/unit_tests/dbTrianglesTests.cc
index da142d189..9b542f376 100644
--- a/src/db/unit_tests/dbTrianglesTests.cc
+++ b/src/db/unit_tests/dbTrianglesTests.cc
@@ -63,6 +63,13 @@ TEST(basic)
   EXPECT_EQ (tris.to_string (), "((1, 0), (1, 4), (5, 0)), ((1, 4), (5, 4), (5, 0))");
 
   EXPECT_EQ (tris.check (), true);
+
+  tris.clear ();
+
+  EXPECT_EQ (tris.bbox ().to_string (), "()");
+  EXPECT_EQ (tris.to_string (), "");
+
+  EXPECT_EQ (tris.check (), true);
 }
 
 TEST(flip)