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-rw-r--r--ext/tcltklib/stubs.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/tcltklib/stubs.c b/ext/tcltklib/stubs.c
index f394d6fc74..a1dd08f4a3 100644
--- a/ext/tcltklib/stubs.c
+++ b/ext/tcltklib/stubs.c
@@ -1,3 +1,5 @@
+int ruby_tcltk_stubs();
+
#if defined USE_TCL_STUBS && defined USE_TK_STUBS
#include <tcl.h>
#include <tk.h>