diff --git a/CMakeLists.txt b/CMakeLists.txt
index 33b7ff9..efe8480 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ option(PLASP_BUILD_TESTS "Build unit tests" OFF)
 
 find_package(Boost 1.55.0 COMPONENTS program_options iostreams system filesystem REQUIRED)
 
-set(CMAKE_CXX_FLAGS "-Wall -Wextra -Wpedantic")
+set(CMAKE_CXX_FLAGS "-Wall -Wextra -Wpedantic -Werror")
 set(CMAKE_CXX_FLAGS_DEBUG "-g")
 
 set(CMAKE_CXX_STANDARD 14)
diff --git a/include/plasp/pddl/translation/Primitives.h b/include/plasp/pddl/translation/Primitives.h
index bb026a6..fca8872 100644
--- a/include/plasp/pddl/translation/Primitives.h
+++ b/include/plasp/pddl/translation/Primitives.h
@@ -94,7 +94,7 @@ inline void translateLiteral(output::ColorStream &outputStream, const Expression
 	}
 	else if (literal.is<expressions::DerivedPredicate>())
 	{
-		const auto &derivedPredicate = literal.as<expressions::DerivedPredicate>();
+		//const auto &derivedPredicate = literal.as<expressions::DerivedPredicate>();
 
 		/*m_outputStream << output::Keyword("variable") << "(";
 		translation::translatePredicate(predicate);