diff --git a/wolfssl/wolfcrypt/types.h b/wolfssl/wolfcrypt/types.h
index 235a0d3c3..c060e1f9b 100644
--- a/wolfssl/wolfcrypt/types.h
+++ b/wolfssl/wolfcrypt/types.h
@@ -333,7 +333,7 @@
 	        #define XSTRNCASECMP(s1,s2,n) _strnicmp((s1),(s2),(n))
         #else
             #if defined(HAVE_STRINGS_H) && defined(WOLF_C99) && \
-                !defined(WOLFSSL_SGX) && !defined(WOLFSSL_ARDUINO)
+                !defined(WOLFSSL_SGX)
                 #include <strings.h>
             #endif
 	        #define XSTRNCASECMP(s1,s2,n) strncasecmp((s1),(s2),(n))