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diff --git a/configure.ac b/configure.ac
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index 5bde0a0..3726921 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -100,7 +100,7 @@ LIBPOSTFIX=
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 case "${host_os}" in
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   *linux* )
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     case "${host_cpu}" in
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-      powerpc64 | s390x | x86_64 | sparc64 )
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+      powerpc64 | s390x | x86_64 | sparc64 | aarch64)
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         LIBPOSTFIX="64"
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         ;;
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     esac