diff --git a/src/Mod/TechDraw/App/EdgeWalker.cpp b/src/Mod/TechDraw/App/EdgeWalker.cpp
index a1775037d4..ae3d5b0af7 100644
--- a/src/Mod/TechDraw/App/EdgeWalker.cpp
+++ b/src/Mod/TechDraw/App/EdgeWalker.cpp
@@ -450,6 +450,13 @@ std::vector<edge_t> EdgeWalker::getEmbeddingRow(int v)
 //*******************************************
 // WalkerEdge Methods
 //*******************************************
+WalkerEdge::WalkerEdge()
+{
+    // Ensure the edge is properly initialized (Coverity defect 316559)
+    ed.m_source = 0;
+    ed.m_target = 0;
+}
+
 bool WalkerEdge::isEqual(WalkerEdge w)
 {
     if ((v1 == w.v1 && v2 == w.v2)  ||
diff --git a/src/Mod/TechDraw/App/EdgeWalker.h b/src/Mod/TechDraw/App/EdgeWalker.h
index 98bbf37fb6..726f449026 100644
--- a/src/Mod/TechDraw/App/EdgeWalker.h
+++ b/src/Mod/TechDraw/App/EdgeWalker.h
@@ -71,14 +71,15 @@ using planar_embedding_t =
 class TechDrawExport WalkerEdge
 {
 public:
+    WalkerEdge();
     static bool weCompare(WalkerEdge i, WalkerEdge j);
     bool isEqual(WalkerEdge w);
     std::string dump();
 
-    std::size_t v1;
-    std::size_t v2;
+    std::size_t v1 {0};
+    std::size_t v2 {0};
     edge_t ed;
-    std::size_t idx;
+    std::size_t idx {0};
 };
 
 class TechDrawExport ewWire