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-rw-r--r--engines/glk/alan2/glkio.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/engines/glk/alan2/glkio.h b/engines/glk/alan2/glkio.h
index 7dca2cab87..151bb7a3b5 100644
--- a/engines/glk/alan2/glkio.h
+++ b/engines/glk/alan2/glkio.h
@@ -31,8 +31,8 @@
namespace Glk {
namespace Alan2 {
-winid_t glkMainWin;
-winid_t glkStatusWin;
+extern winid_t glkMainWin;
+extern winid_t glkStatusWin;
/* NB: this header must be included in any file which calls print() */