diff --git a/src/simulator/nstime.h b/src/simulator/nstime.h
index 5d39612e3..5db1c6d53 100644
--- a/src/simulator/nstime.h
+++ b/src/simulator/nstime.h
@@ -27,7 +27,6 @@
 #include <math.h>
 #include <ostream>
 #include "high-precision.h"
-#include "cairo-wideint-private.h"
 
 namespace ns3 {