1 files changed, 3 insertions, 0 deletions
diff --git a/acconfig.h b/acconfig.h
index e801f91..1a35ac6 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -7,6 +7,9 @@
 /* Define if we have parallel support */
 #undef HAVE_PARALLEL
 
+/* Define if we have thread safe support */
+#undef HAVE_THREADSAFE
+
 /* Define if it's safe to use `long long' for hsize_t and hssize_t */
 #undef HAVE_LARGE_HSIZET