diff --git a/configure.ac b/configure.ac
index 5c33c2ec9..9c9965eed 100644
--- a/configure.ac
+++ b/configure.ac
@@ -343,6 +343,7 @@ then
     enable_shared=no
     enable_static=yes
     AM_CFLAGS="$AM_CFLAGS -DHAVE_SECRET_CALLBACK -DWOLFSSL_STATIC_RSA"
+    AM_CFLAGS="$AM_CFLAGS -DATOMIC_USER"
     AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_WPAS"
 fi