diff --git a/src/config-store/model/config-store.cc b/src/config-store/model/config-store.cc
index ec3531e09..7da8966f0 100644
--- a/src/config-store/model/config-store.cc
+++ b/src/config-store/model/config-store.cc
@@ -25,7 +25,6 @@
 #include <fstream>
 #include <iostream>
 #include <string>
-#include <unistd.h>
 
 namespace ns3
 {