diff --git a/wolfssl/wolfcrypt/types.h b/wolfssl/wolfcrypt/types.h
index 0f380e36b..8da6f8038 100755
--- a/wolfssl/wolfcrypt/types.h
+++ b/wolfssl/wolfcrypt/types.h
@@ -332,7 +332,8 @@
         #elif defined(USE_WINDOWS_API)
 	        #define XSTRNCASECMP(s1,s2,n) _strnicmp((s1),(s2),(n))
         #else
-            #if defined(HAVE_STRINGS_H) || defined(WOLF_C99)
+            #if (defined(HAVE_STRINGS_H) || defined(WOLF_C99)) && \
+                !defined(WOLFSSL_SGX)
                 #include <strings.h>
             #endif
 	        #define XSTRNCASECMP(s1,s2,n) strncasecmp((s1),(s2),(n))