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-rw-r--r--generic/ttk/ttkButton.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/generic/ttk/ttkButton.c b/generic/ttk/ttkButton.c
index 2954184..bc44f25 100644
--- a/generic/ttk/ttkButton.c
+++ b/generic/ttk/ttkButton.c
@@ -413,8 +413,8 @@ typedef struct
static Tk_OptionSpec CheckbuttonOptionSpecs[] =
{
{TK_OPTION_STRING, "-variable", "variable", "Variable",
- "", Tk_Offset(Checkbutton, checkbutton.variableObj), -1,
- TK_OPTION_DONT_SET_DEFAULT,0,0},
+ NULL, Tk_Offset(Checkbutton, checkbutton.variableObj), -1,
+ TK_OPTION_NULL_OK,0,0},
{TK_OPTION_STRING, "-onvalue", "onValue", "OnValue",
"1", Tk_Offset(Checkbutton, checkbutton.onValueObj), -1,
0,0,0},