diff --git a/configure.ac b/configure.ac
index c70dd4891..bb5f05748 100644
--- a/configure.ac
+++ b/configure.ac
@@ -626,6 +626,9 @@ then
 
     # Enable DH Extra
     AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_DH_EXTRA"
+
+    # Enable deterministic ECC signing API with variant
+    AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_ECDSA_DETERMINISTIC_K_VARIANT"
 fi