diff --git a/setup.py b/setup.py
index 8aad1ce..5ebaf67 100644
--- a/setup.py
+++ b/setup.py
@@ -237,7 +237,6 @@ if sys.platform == "aix4":
 elif sys.platform == "aix5":
     extraCompileArgs.append("-DAIX5")
 elif sys.platform == "cygwin":
-    extraCompileArgs.append("-mno-cygwin")
     extraLinkArgs.append("-Wl,--enable-runtime-pseudo-reloc")
 elif sys.platform == "darwin":
     extraLinkArgs.append("-shared-libgcc")