diff --git a/bin/test/data/log/test_log.txt b/bin/test/data/log/test_log.txt
index 5432087a..c900aa2f 100644
--- a/bin/test/data/log/test_log.txt
+++ b/bin/test/data/log/test_log.txt
@@ -1,3 +1,4 @@
+Settings.cpp WARNING: File for Settings not found: data/TestSettings.xml
 Token.cpp ERROR: Location Id was not referenced by this Token.
 Node.cpp WARNING: Cannot change NodeType after it was already set from namespace to class
 Edge.cpp ERROR: Nodes are not plain copies.
diff --git a/src/lib/data/location/SourceLocationCollection.h b/src/lib/data/location/SourceLocationCollection.h
index 4366eae6..c96548c3 100644
--- a/src/lib/data/location/SourceLocationCollection.h
+++ b/src/lib/data/location/SourceLocationCollection.h
@@ -1,6 +1,7 @@
 #ifndef SOURCE_LOCATION_COLLECTION_H
 #define SOURCE_LOCATION_COLLECTION_H
 
+#include <functional>
 #include <map>
 #include <memory>
 #include <ostream>