diff --git a/src/inner.h b/src/inner.h
index 21d996e..986220f 100644
--- a/src/inner.h
+++ b/src/inner.h
@@ -116,6 +116,8 @@
 #define BR_64   1
 #elif defined(__aarch64__) || defined(_M_ARM64)
 #define BR_64   1
+#elif defined(__mips64)
+#define BR_64   1
 #endif
 #endif