diff --git a/wolfssl/wolfcrypt/settings.h b/wolfssl/wolfcrypt/settings.h
index 39472abdc..715821caa 100644
--- a/wolfssl/wolfcrypt/settings.h
+++ b/wolfssl/wolfcrypt/settings.h
@@ -458,6 +458,7 @@
     #define NO_MAIN_DRIVER
     #define NO_DEV_RANDOM
     #define NO_WRITEV
+    #define HAVE_STRINGS_H
 #endif