diff --git a/basicnode.go b/basicnode.go
index 6cf5671..5404013 100644
--- a/basicnode.go
+++ b/basicnode.go
@@ -24,6 +24,9 @@ func (n *basicNode) Parent() Node {
 
 // Child returns current node child at specified quadrant.
 func (n *basicNode) Child(q Quadrant) Node {
+	if n.c[q] == nil {
+		return nil
+	}
 	return n.c[q]
 }
 
diff --git a/cnnode.go b/cnnode.go
index 9f5a22b..53d1381 100644
--- a/cnnode.go
+++ b/cnnode.go
@@ -50,6 +50,9 @@ func (n *cnNode) Parent() Node {
 
 // Child returns current node child at specified quadrant.
 func (n *cnNode) Child(q Quadrant) Node {
+	if n.c[q] == nil {
+		return nil
+	}
 	return n.c[q]
 }