diff --git a/src/libutil/hash.cc b/src/libutil/hash.cc
index 2c8085e42..3f6d4c0c9 100644
--- a/src/libutil/hash.cc
+++ b/src/libutil/hash.cc
@@ -210,7 +210,7 @@ Hash newHashAllowEmpty(std::string hashStr, HashType ht)
     if (hashStr.empty())
     {
         Hash h(ht);
-        warn("found empty hash, assuming you wanted '%s'", h.to_string());
+        warn("found empty hash, assuming you wanted '%s'", h.to_string(SRI));
     } else
         return Hash(hashStr, ht);
 }