diff --git a/include/boost/thread/exceptions.hpp b/include/boost/thread/exceptions.hpp
index 2296ed30..9b4e9f93 100644
--- a/include/boost/thread/exceptions.hpp
+++ b/include/boost/thread/exceptions.hpp
@@ -20,6 +20,7 @@
 //       given the include guards, but regardless it makes sense to
 //       seperate this out any way.
 
+#include <string>
 #include <stdexcept>
 
 namespace boost {
diff --git a/src/mutex.cpp b/src/mutex.cpp
index c02f578f..ff49d989 100644
--- a/src/mutex.cpp
+++ b/src/mutex.cpp
@@ -16,6 +16,7 @@
 #include <boost/thread/thread.hpp>
 #include <boost/thread/exceptions.hpp>
 #include <boost/limits.hpp>
+#include <string>
 #include <stdexcept>
 #include <cassert>
 #include "timeconv.inl"
diff --git a/src/recursive_mutex.cpp b/src/recursive_mutex.cpp
index 5e79498d..ae00834d 100644
--- a/src/recursive_mutex.cpp
+++ b/src/recursive_mutex.cpp
@@ -15,6 +15,7 @@
 #include <boost/thread/xtime.hpp>
 #include <boost/thread/thread.hpp>
 #include <boost/limits.hpp>
+#include <string>
 #include <stdexcept>
 #include <cassert>
 #include "timeconv.inl"
diff --git a/src/tss.cpp b/src/tss.cpp
index 5ad307fc..f1191eff 100644
--- a/src/tss.cpp
+++ b/src/tss.cpp
@@ -18,6 +18,7 @@
 #include <boost/thread/mutex.hpp>
 #include <boost/thread/exceptions.hpp>
 #include <vector>
+#include <string>
 #include <stdexcept>
 #include <cassert>