diff --git a/src/plasp/sas/Description.cpp b/src/plasp/sas/Description.cpp
index 29f4d66..31bec22 100644
--- a/src/plasp/sas/Description.cpp
+++ b/src/plasp/sas/Description.cpp
@@ -265,7 +265,7 @@ void Description::parseMetricSection(std::istream &istream)
 {
 	parseSectionIdentifier(istream, "begin_metric");
 
-	istream >> m_usesActionCosts;
+	m_usesActionCosts = parse<bool>(istream);
 
 	parseSectionIdentifier(istream, "end_metric");
 }