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-rw-r--r--ext/tcltklib/stubs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/tcltklib/stubs.c b/ext/tcltklib/stubs.c
index 537ca74d37..faf5b4bb4b 100644
--- a/ext/tcltklib/stubs.c
+++ b/ext/tcltklib/stubs.c
@@ -3,7 +3,7 @@
#include <tk.h>
#include "ruby.h"
-#if defined _WIN32
+#if defined _WIN32 || defined __CYGWIN__
# include <windows.h>
typedef HINSTANCE DL_HANDLE;
# define DL_OPEN LoadLibrary