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diff --git a/configure.in b/configure.in
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index e70c99a..60f366c 100644
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--- a/configure.in
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+++ b/configure.in
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@@ -1416,7 +1416,7 @@ inline static unsigned int sleep(unsigned int seconds) {
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 #endif /* CONFIG_H */
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 ])
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-AM_CONFIG_HEADER(config.h)
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+AC_CONFIG_HEADERS(config.h)
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 AC_OUTPUT(Makefile
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 libsasl2.pc