diff --git a/src/base/base_core.c b/src/base/base_core.c
index 2711b9e7..97515ce6 100644
--- a/src/base/base_core.c
+++ b/src/base/base_core.c
@@ -41,7 +41,7 @@ u128_zero(void)
 internal U128
 u128_make(U64 v0, U64 v1)
 {
-  U128 v = {v0, v1};
+  U128 v = { .u64 = { v0, v1 }};
   return v;
 }