diff --git a/libethereum/CanonBlockChain.cpp b/libethereum/CanonBlockChain.cpp
index 8e9d2ae6c..2a7408437 100644
--- a/libethereum/CanonBlockChain.cpp
+++ b/libethereum/CanonBlockChain.cpp
@@ -49,10 +49,10 @@ CanonBlockChain<Ethash>::CanonBlockChain(std::string const& _path, WithExisting
 {
 }
 
-void CanonBlockChain<Ethash>::reopen(std::string const& _path, WithExisting _we, ProgressCallback const& _pc)
+void CanonBlockChain<Ethash>::reopen(WithExisting _we, ProgressCallback const& _pc)
 {
 	close();
-	open(createGenesisBlock(), createGenesisState(), _path, _we, _pc);
+	open(createGenesisBlock(), createGenesisState(), m_dbPath, _we, _pc);
 }
 
 bytes CanonBlockChain<Ethash>::createGenesisBlock()
diff --git a/libethereum/CanonBlockChain.h b/libethereum/CanonBlockChain.h
index 44f28980d..d09108b38 100644
--- a/libethereum/CanonBlockChain.h
+++ b/libethereum/CanonBlockChain.h
@@ -79,7 +79,7 @@ public:
 	~CanonBlockChain() {}
 
 	/// Reopen everything.
-	virtual void reopen(std::string const& _path, WithExisting _we = WithExisting::Trust, ProgressCallback const& _pc = ProgressCallback());
+	virtual void reopen(WithExisting _we = WithExisting::Trust, ProgressCallback const& _pc = ProgressCallback());
 
 	/// @returns the genesis block header.
 	static Ethash::BlockHeader const& genesis();