diff --git a/pmap.go b/pmap.go
index eedef9c..03e0d48 100644
--- a/pmap.go
+++ b/pmap.go
@@ -95,7 +95,7 @@ func (m *collision) getNode(hash uint32, key Key) interface{} {
 	}
 	for i := range m.leaf {
 		if key == m.leaf[i].k {
-			return m.leaf[i].v
+			return m.leaf[i]
 		}
 	}
 	return nil
@@ -157,7 +157,7 @@ func insert(n interface{}, shift, hash uint32, key Key, val Value, hashFn hashFu
 			} else if h := hashFn(n.k); h == hash {
 				// collision
 				added = true
-				return collision{hash, []leaf{{key, val}, n}}
+				return &collision{hash, []leaf{{key, val}, n}}
 			} else {
 				if h>>shift == hash>>shift {
 					panic("pmap: infinite loop in insert")
@@ -196,12 +196,12 @@ func insert(n interface{}, shift, hash uint32, key Key, val Value, hashFn hashFu
 					l = append(l, n.leaf[:i]...)
 					l = append(l, n.leaf[i+1:]...)
 					added = false
-					return collision{hash, l}
+					return &collision{hash, l}
 				}
 			}
 			// new collision
 			added = true
-			return collision{hash, append([]leaf{{key, val}}, n.leaf...)}
+			return &collision{hash, append([]leaf{{key, val}}, n.leaf...)}
 		default:
 			panic("pmap: unhandled case in insert")
 		}