diff --git a/configure.ac b/configure.ac
index 355510e8b..49f9f7aaf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9458,6 +9458,7 @@ then
     AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_AES_DIRECT"
     AM_CFLAGS="$AM_CFLAGS -DWC_RSA_NO_PADDING"
     AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_PUBLIC_MP"
+    AM_CFLAGS="$AM_CFLAGS -DRSA_MIN_SIZE=1024"
 fi
 
 if test "$ENABLED_WOLFENGINE" = "yes" && test "$ENABLED_FIPS" != "no"