diff --git a/configure/os/CONFIG_SITE.win32-x86-cygwin.win32-x86-cygwin b/configure/os/CONFIG_SITE.win32-x86-cygwin.win32-x86-cygwin
new file mode 100644
index 000000000..bf9e33a83
--- /dev/null
+++ b/configure/os/CONFIG_SITE.win32-x86-cygwin.win32-x86-cygwin
@@ -0,0 +1,4 @@
+
+# Shared libraries are not yet supported in cygwin builds.
+SHARED_LIBRARIES=NO
+