diff --git a/dep/vixl/include/vixl/utils-vixl.h b/dep/vixl/include/vixl/utils-vixl.h
index a6632b2fc..486b2ba6c 100644
--- a/dep/vixl/include/vixl/utils-vixl.h
+++ b/dep/vixl/include/vixl/utils-vixl.h
@@ -1435,7 +1435,7 @@ constexpr uint32_t Hash(const char* str, uint32_t hash = 0) {
   }
 }
 
-constexpr uint32_t operator"" _h(const char* x, size_t) { return Hash(x); }
+constexpr uint32_t operator""_h(const char* x, size_t) { return Hash(x); }
 
 }  // namespace vixl