diff --git a/include/openssl/base.h b/include/openssl/base.h
index 37bca56..217908c 100644
--- a/include/openssl/base.h
+++ b/include/openssl/base.h
@@ -82,9 +82,12 @@
 #elif defined(__aarch64__)
 #define OPENSSL_64_BIT
 #define OPENSSL_AARCH64
-#elif defined(__mips__)
+#elif defined(__mips__) && !defined(__LP64__)
 #define OPENSSL_32_BIT
 #define OPENSSL_MIPS
+#elif defined(__mips__) && defined(__LP64__)
+#define OPENSSL_64_BIT
+#define OPENSSL_MIPS64
 #elif defined(__pnacl__)
 #define OPENSSL_32_BIT
 #define OPENSSL_PNACL