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diff --git a/hping2.h b/hping2.h
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index 70e2035..3766e1d 100644
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--- a/hping2.h
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+++ b/hping2.h
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@@ -353,7 +353,7 @@ struct delaytable_element {
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 	int status;
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 };
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-volatile struct delaytable_element delaytable[TABLESIZE];
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+extern volatile struct delaytable_element delaytable[TABLESIZE];
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 /* protos */
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 void	nop(void);				/* nop */