diff --git a/libc/src/__support/HashTable/sse2/bitmask_impl.inc b/libc/src/__support/HashTable/sse2/bitmask_impl.inc
index d65240901ed40..e778c19f284a8 100644
--- a/libc/src/__support/HashTable/sse2/bitmask_impl.inc
+++ b/libc/src/__support/HashTable/sse2/bitmask_impl.inc
@@ -33,7 +33,7 @@ struct Group {
   LIBC_INLINE IteratableBitMask match_byte(uint8_t byte) const {
     auto cmp = _mm_cmpeq_epi8(data, _mm_set1_epi8(byte));
     auto bitmask = static_cast<uint16_t>(_mm_movemask_epi8(cmp));
-    return {bitmask};
+    return {{bitmask}};
   }
 
   LIBC_INLINE BitMask mask_available() const {
@@ -42,7 +42,7 @@ struct Group {
   }
 
   LIBC_INLINE IteratableBitMask occupied() const {
-    return {static_cast<uint16_t>(~mask_available().word)};
+    return {{static_cast<uint16_t>(~mask_available().word)}};
   }
 };
 } // namespace internal