diff --git a/deps/v8/src/base/macros.h b/deps/v8/src/base/macros.h
index 371d7da6eaa722..a3a238fe17e80a 100644
--- a/deps/v8/src/base/macros.h
+++ b/deps/v8/src/base/macros.h
@@ -333,7 +333,7 @@ inline void USE(T) { }
 # define V8_INTPTR_C(x)   (x ## LL)
 # define V8_PTR_PREFIX    "I64"
 #elif V8_HOST_ARCH_64_BIT
-# if V8_OS_MACOSX
+# if (V8_OS_MACOSX || V8_OS_OPENBSD)
 #  define V8_UINT64_C(x)   (x ## ULL)
 #  define V8_INT64_C(x)    (x ## LL)
 # else