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-rw-r--r--src/bltGraphLine.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/bltGraphLine.h b/src/bltGraphLine.h
index 57b2e19..6e4580f 100644
--- a/src/bltGraphLine.h
+++ b/src/bltGraphLine.h
@@ -30,6 +30,8 @@
#ifndef __BltGraphLine_h__
#define __BltGraphLine_h__
+#include <tk.h>
+
#include "bltGraph.h"
typedef struct {