diff --git a/examples/Utils/b3Clock.cpp b/examples/Utils/b3Clock.cpp
index 7482c302d..8e1884526 100644
--- a/examples/Utils/b3Clock.cpp
+++ b/examples/Utils/b3Clock.cpp
@@ -239,7 +239,7 @@ void b3Clock::usleep(int microSeconds)
 	Sleep(millis);
 #else
 
-    usleep(microSeconds); 
+    ::usleep(microSeconds); 
 	//struct timeval tv;
 	//tv.tv_sec = microSeconds/1000000L;
 	//tv.tv_usec = microSeconds%1000000L;