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-rw-r--r--configure.ac1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index dbafd73c..472a7d16 100644
--- a/configure.ac
+++ b/configure.ac
@@ -407,6 +407,7 @@ AC_CHECK_HEADERS([assert.h errno.h byteswap.h sys/param.h sys/sysctl.h],
AC_C_INLINE
AC_C_RESTRICT
+AX_C_ARITHMETIC_RSHIFT
AC_HEADER_STDBOOL