diff --git a/src/main/java/com/github/kilianB/hash/Hash.java b/src/main/java/com/github/kilianB/hash/Hash.java
index c49e0fa..610bd4d 100644
--- a/src/main/java/com/github/kilianB/hash/Hash.java
+++ b/src/main/java/com/github/kilianB/hash/Hash.java
@@ -436,7 +436,7 @@ public boolean equals(Object obj) {
 			return true;
 		if (obj == null)
 			return false;
-		if (getClass() != obj.getClass())
+		if (!(obj instanceof Hash))
 			return false;
 		Hash other = (Hash) obj;
 		if (algorithmId != other.getAlgorithmId())