diff --git a/Compiler.h b/Compiler.h
index 4b1e1b4d6..260aebd33 100644
--- a/Compiler.h
+++ b/Compiler.h
@@ -42,9 +42,10 @@ public:
 	bytes getAssembledBytecode() { return m_context.getAssembledBytecode(m_optimize); }
 	bytes getRuntimeBytecode() { return m_runtimeContext.getAssembledBytecode(m_optimize);}
 	/// @arg _sourceCodes is the map of input files to source code strings
-	void streamAssembly(std::ostream& _stream, StringMap const& _sourceCodes = StringMap()) const
+	/// @arg _inJsonFromat shows weather the out should be in Json format
+	void streamAssembly(std::ostream& _stream, StringMap const& _sourceCodes = StringMap(), bool _inJsonFormat = false) const
 	{
-		m_context.streamAssembly(_stream, _sourceCodes);
+		m_context.streamAssembly(_stream, _sourceCodes, _inJsonFormat);
 	}
 	/// @returns Assembly items of the normal compiler context
 	eth::AssemblyItems const& getAssemblyItems() const { return m_context.getAssembly().getItems(); }
diff --git a/CompilerContext.h b/CompilerContext.h
index e752d59b8..3fcf0706d 100644
--- a/CompilerContext.h
+++ b/CompilerContext.h
@@ -122,7 +122,8 @@ public:
 
 	eth::Assembly const& getAssembly() const { return m_asm; }
 	/// @arg _sourceCodes is the map of input files to source code strings
-	void streamAssembly(std::ostream& _stream, StringMap const& _sourceCodes = StringMap()) const { m_asm.stream(_stream, "", _sourceCodes); }
+	/// @arg _inJsonFromat shows weather the out should be in Json format
+	void streamAssembly(std::ostream& _stream, StringMap const& _sourceCodes = StringMap(), bool _inJsonFormat = false) const { m_asm.stream(_stream, "", _sourceCodes, _inJsonFormat); }
 
 	bytes getAssembledBytecode(bool _optimize = false) { return m_asm.optimise(_optimize).assemble(); }
 
diff --git a/CompilerStack.cpp b/CompilerStack.cpp
index c35d9324c..592f61276 100644
--- a/CompilerStack.cpp
+++ b/CompilerStack.cpp
@@ -184,11 +184,11 @@ dev::h256 CompilerStack::getContractCodeHash(string const& _contractName) const
 	return dev::sha3(getRuntimeBytecode(_contractName));
 }
 
-void CompilerStack::streamAssembly(ostream& _outStream, string const& _contractName, StringMap _sourceCodes) const
+void CompilerStack::streamAssembly(ostream& _outStream, string const& _contractName, StringMap _sourceCodes, bool _inJsonFormat) const
 {
 	Contract const& contract = getContract(_contractName);
 	if (contract.compiler)
-		getContract(_contractName).compiler->streamAssembly(_outStream, _sourceCodes);
+		contract(_contractName).compiler->streamAssembly(_outStream, _sourceCodes, _inJsonFormat);
 	else
 		_outStream << "Contract not fully implemented" << endl;
 }
diff --git a/CompilerStack.h b/CompilerStack.h
index 19c1ba4e1..ef3d09663 100644
--- a/CompilerStack.h
+++ b/CompilerStack.h
@@ -102,8 +102,9 @@ public:
 
 	/// Streams a verbose version of the assembly to @a _outStream.
 	/// @arg _sourceCodes is the map of input files to source code strings
+	/// @arg _inJsonFromat shows weather the out should be in Json format
 	/// Prerequisite: Successful compilation.
-	void streamAssembly(std::ostream& _outStream, std::string const& _contractName = "", StringMap _sourceCodes = StringMap()) const;
+	void streamAssembly(std::ostream& _outStream, std::string const& _contractName = "", StringMap _sourceCodes = StringMap(), bool _inJsonFormat = false) const;
 
 	/// Returns a string representing the contract interface in JSON.
 	/// Prerequisite: Successful call to parse or compile.