Add missing header.

[shibboleth/cpp-xmltooling.git] / xmltooling / security / impl / ChainingCredentialResolver.cpp

diff --git a/xmltooling/security/impl/ChainingCredentialResolver.cpp b/xmltooling/security/impl/ChainingCredentialResolver.cpp
index 881a16f..8f6852c 100644 (file)
--- a/xmltooling/security/impl/ChainingCredentialResolver.cpp
+++ b/xmltooling/security/impl/ChainingCredentialResolver.cpp
@@ -32,6 +32,7 @@
 #include "util/XMLHelper.h"
 
 #include <algorithm>
+#include <functional>
 #include <xercesc/util/XMLUniDefs.hpp>
 
 using namespace xmltooling::logging;