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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 d850dfda..85f2c75a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -128,6 +128,7 @@ AC_TRY_COMPILE([
# check for availability of atomic operations
RS_ATOMIC_OPERATIONS
+RS_ATOMIC_OPERATIONS_64BIT
# Additional module directories