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-rw-r--r--src/bltGrAxisOption.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/bltGrAxisOption.h b/src/bltGrAxisOption.h
index f5f1fa6..4efa8ee 100644
--- a/src/bltGrAxisOption.h
+++ b/src/bltGrAxisOption.h
@@ -30,6 +30,8 @@
#ifndef __BltGrAxisOption_h__
#define __BltGrAxisOption_h__
+#include <tk.h>
+
extern Tk_ObjCustomOption xAxisObjOption;
extern Tk_ObjCustomOption yAxisObjOption;
extern Tk_ObjCustomOption limitObjOption;