diff --git a/src/libutil/hash.cc b/src/libutil/hash.cc
index d2fd0c15a..5a7be47b2 100644
--- a/src/libutil/hash.cc
+++ b/src/libutil/hash.cc
@@ -130,7 +130,7 @@ std::string Hash::to_string(Base base, bool includeType) const
         break;
     case Base64:
     case SRI:
-        s += base64Encode(std::string((const char *) hash, hashSize));
+        s += base64Encode(std::string_view((const char *) hash, hashSize));
         break;
     }
     return s;