diff --git a/src/backend/static_request.cc b/src/backend/static_request.cc
index a4cdafe..4a07587 100644
--- a/src/backend/static_request.cc
+++ b/src/backend/static_request.cc
@@ -24,7 +24,6 @@
 #include <cassert>
 
 using namespace sgpem;
-using namespace std;
 
 StaticRequest::StaticRequest(StaticThread* thread,
                              unsigned int instant) :