diff --git a/include/ircd/hash.h b/include/ircd/hash.h
index 60d8bab00..6c66e80e7 100644
--- a/include/ircd/hash.h
+++ b/include/ircd/hash.h
@@ -59,10 +59,7 @@ struct ircd::crh::hash
 	virtual void digest(const mutable_buffer &) const = 0;
 
 	/// Samples the digest and modifies the state (depending on impl)
-	virtual void finalize(const mutable_buffer &b)
-	{
-		digest(b);
-	}
+	virtual void finalize(const mutable_buffer &b);
 
 	/// Appends to the message
 	virtual void update(const const_buffer &) = 0;
diff --git a/ircd/hash.cc b/ircd/hash.cc
index 4d7bb9ef4..e2967a1f2 100644
--- a/ircd/hash.cc
+++ b/ircd/hash.cc
@@ -27,3 +27,9 @@ ircd::crh::hash::operator()(const mutable_buffer &out,
 	update(in);
 	finalize(out);
 }
+
+void
+ircd::crh::hash::finalize(const mutable_buffer &b)
+{
+	digest(b);
+}