diff --git a/lib/base/process.cpp b/lib/base/process.cpp
index 089e41dae..37ca62935 100644
--- a/lib/base/process.cpp
+++ b/lib/base/process.cpp
@@ -199,8 +199,8 @@ void Process::IOThreadProc(int tid)
 #endif /* _WIN32 */
 
 			int i = 1;
-			std::pair<ProcessHandle, Process::Ptr> kv;
-			BOOST_FOREACH(kv, l_Processes[tid]) {
+			typedef std::pair<ProcessHandle, Process::Ptr> kv_pair;
+			BOOST_FOREACH(const kv_pair& kv, l_Processes[tid]) {
 				const Process::Ptr& process = kv.second;
 #ifdef _WIN32
 				handles[i] = kv.first;