diff --git a/include/anthem/Body.h b/include/anthem/Body.h
index 367005c..169b2b3 100644
--- a/include/anthem/Body.h
+++ b/include/anthem/Body.h
@@ -90,7 +90,7 @@ struct TermPrintVisitor
 		outputStream << " " << Clingo::AST::BinaryOperator::And << " ";
 
 		if (literal.sign == Clingo::AST::Sign::Negation)
-			std::cout << Clingo::AST::Sign::Negation << " ";
+			outputStream << Clingo::AST::Sign::Negation << " ";
 
 		outputStream << output::Function(function.name) << "(";
 
diff --git a/include/anthem/StatementVisitor.h b/include/anthem/StatementVisitor.h
index f198cc4..0516769 100644
--- a/include/anthem/StatementVisitor.h
+++ b/include/anthem/StatementVisitor.h
@@ -19,7 +19,8 @@ struct StatementVisitor
 {
 	void visit(const Clingo::AST::Program &program, const Clingo::AST::Statement &statement, Context &context)
 	{
-		context.logger.log(output::Priority::Debug, program.name);
+		// TODO: refactor
+		context.logger.log(output::Priority::Debug, (std::string("[program] ") + program.name).c_str());
 
 		if (!program.parameters.empty())
 			throwErrorAtLocation(statement.location, "program parameters currently unsupported", context);
diff --git a/src/anthem/Translation.cpp b/src/anthem/Translation.cpp
index 87b8cb6..5723768 100644
--- a/src/anthem/Translation.cpp
+++ b/src/anthem/Translation.cpp
@@ -32,7 +32,8 @@ void translate(const std::vector<std::string> &fileNames, Context &context)
 
 void translate(const char *fileName, std::istream &stream, Context &context)
 {
-	std::cout << "info: reading " << fileName << std::endl;
+	// TODO: refactor
+	context.logger.log(output::Priority::Note, (std::string("reading ") + fileName).c_str());
 
 	auto fileContent = std::string(std::istreambuf_iterator<char>(stream), {});