diff --git a/src/storm/api/builder.h b/src/storm/api/builder.h
index 774100c4f..dab7ac5d5 100644
--- a/src/storm/api/builder.h
+++ b/src/storm/api/builder.h
@@ -116,7 +116,7 @@ namespace storm {
         }
         
         template<typename ValueType>
-        std::shared_ptr<storm::models::sparse::Model<ValueType>> buildExplicitModel(std::string const&, std::string const&, boost::optional<std::string> const& = boost::none, boost::optional<std::string> const& = boost::none, boost::optional<std::string> const& = boost::none) {
+        std::shared_ptr<storm::models::sparse::Model<ValueType>> buildExplicitModel(std::string const& transitionsFile, std::string const& labelingFile, boost::optional<std::string> const& stateRewardsFile = boost::none, boost::optional<std::string> const& transitionRewardsFile = boost::none, boost::optional<std::string> const& choiceLabelingFile = boost::none) {
             STORM_LOG_THROW(false, storm::exceptions::NotSupportedException, "Exact or parametric models with explicit input are not supported.");
         }
         
diff --git a/src/storm/api/properties.h b/src/storm/api/properties.h
index bcc1a8882..c52073105 100644
--- a/src/storm/api/properties.h
+++ b/src/storm/api/properties.h
@@ -4,6 +4,7 @@
 #include <set>
 #include <map>
 #include <vector>
+#include <memory>
 #include <boost/optional.hpp>
 
 namespace storm {