diff --git a/glib/glib-private.h b/glib/glib-private.h
index c24b59d6f..28ac63458 100644
--- a/glib/glib-private.h
+++ b/glib/glib-private.h
@@ -47,14 +47,14 @@
 /* If GLib itself is not compiled with ASAN sanitizer we may still want to
  * control it in case it's linked by the loading application, so we need to
  * do this check dynamically.
- * However MinGW doesn't support weak attribute properly (even if it advertises
+ * However MinGW/Cygwin doesn't support weak attribute properly (even if it advertises
  * it), so we ignore it in such case since it's not convenient to go through
  * dlsym().
  * Under MSVC we could use alternatename, but it doesn't seem to be as reliable
  * as we'd like: https://stackoverflow.com/a/11529277/210151 and
  * https://devblogs.microsoft.com/oldnewthing/20200731-00/?p=104024
  */
-#elif defined (G_OS_UNIX) && !defined (__APPLE__) && g_macro__has_attribute (weak)
+#elif defined (G_OS_UNIX) && !defined (__APPLE__) && !defined(__CYGWIN__) && g_macro__has_attribute (weak)
 
 #define HAS_DYNAMIC_ASAN_LOADING