diff --git a/src/support/os_cygwin.cpp b/src/support/os_cygwin.cpp
index 450b998346..c4c02bea87 100644
--- a/src/support/os_cygwin.cpp
+++ b/src/support/os_cygwin.cpp
@@ -27,7 +27,6 @@
 
 #include <sys/cygwin.h>
 
-using std::endl;
 using std::string;