diff --git a/src/hyperloglog.rs b/src/hyperloglog.rs
index 6bda970..a676cc0 100644
--- a/src/hyperloglog.rs
+++ b/src/hyperloglog.rs
@@ -41,7 +41,7 @@ use crate::HyperLogLogError;
 ///   algorithm", Philippe Flajolet, Éric Fusy, Olivier Gandouet and Frédéric
 ///   Meunier.](http://algo.inria.fr/flajolet/Publications/FlFuGaMe07.pdf)
 ///
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize)]
 pub struct HyperLogLogPF<H, B>
 where
     H: Hash + ?Sized,
@@ -54,6 +54,22 @@ where
     phantom:   PhantomData<H>,
 }
 
+impl<H, B> Clone for HyperLogLogPF<H, B> 
+where
+    H: Hash + ?Sized,
+    B: BuildHasher + Clone,
+{
+    fn clone(&self) -> Self {
+        Self {
+            builder:   self.builder.clone(),
+            count:     self.count,
+            precision: self.precision,
+            registers: self.registers.clone(),
+            phantom:   self.phantom,
+        }
+    }
+}
+
 impl<H, B> HyperLogLogPF<H, B>
 where
     H: Hash + ?Sized,
diff --git a/src/hyperloglogplus.rs b/src/hyperloglogplus.rs
index 9264ced..f06dc0d 100644
--- a/src/hyperloglogplus.rs
+++ b/src/hyperloglogplus.rs
@@ -53,7 +53,7 @@ use crate::HyperLogLogError;
 ///   of the Art Cardinality Estimation Algorithm", Stefan Heule, Marc
 ///   Nunkesser and Alexander Hall.](https://goo.gl/iU8Ig)
 ///
-#[derive(Clone, Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize)]
 pub struct HyperLogLogPlus<H, B>
 where
     H: Hash + ?Sized,
@@ -68,6 +68,24 @@ where
     phantom:   PhantomData<H>,
 }
 
+impl<H, B> Clone for HyperLogLogPlus<H, B> 
+where
+    H: Hash + ?Sized,
+    B: BuildHasher + Clone,
+{
+    fn clone(&self) -> Self {
+        Self {
+            builder:   self.builder.clone(),
+            precision: self.precision,
+            counts:    self.counts,
+            tmpset:    self.tmpset.clone(),
+            sparse:    self.sparse.clone(),
+            registers: self.registers.clone(),
+            phantom:   self.phantom,
+        }
+    }
+}
+
 impl<H, B> HyperLogLogPlus<H, B>
 where
     H: Hash + ?Sized,