diff --git a/src/HashedObject.h b/src/HashedObject.h
index 7f31912542..20a187fb72 100644
--- a/src/HashedObject.h
+++ b/src/HashedObject.h
@@ -36,10 +36,10 @@ public:
 	HashedObject(HashedObjectType type, uint32 index, const std::vector<unsigned char>& data, const uint256& hash) :
 		mType(type), mHash(hash), mLedgerIndex(index), mData(data) { ; }
 
-	const std::vector<unsigned char>& getData()		{ return mData; }
-	const uint256& getHash() 						{ return mHash; }
-	HashedObjectType getType()						{ return mType; }
-	uint32 getIndex()								{ return mLedgerIndex; }
+	const std::vector<unsigned char>& getData() const	{ return mData; }
+	const uint256& getHash() const						{ return mHash; }
+	HashedObjectType getType() const					{ return mType; }
+	uint32 getIndex() const								{ return mLedgerIndex; }
 };
 
 class HashedObjectStore