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-rw-r--r--boost/property_map/property_map.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/boost/property_map/property_map.hpp b/boost/property_map/property_map.hpp
index cd6dd5579c..5c9fb11c99 100644
--- a/boost/property_map/property_map.hpp
+++ b/boost/property_map/property_map.hpp
@@ -20,6 +20,7 @@
#include <boost/concept_check.hpp>
#include <boost/concept_archetype.hpp>
#include <boost/mpl/assert.hpp>
+#include <boost/mpl/if.hpp>
#include <boost/mpl/or.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/has_xxx.hpp>