1 files changed, 1 insertions, 2 deletions
diff --git a/src/libfetchers/fetchers.cc b/src/libfetchers/fetchers.cc
index 9174c3de4..b1782feab 100644
--- a/src/libfetchers/fetchers.cc
+++ b/src/libfetchers/fetchers.cc
@@ -35,8 +35,7 @@ std::unique_ptr<Input> inputFromAttrs(const Attrs & attrs)
         auto res = inputScheme->inputFromAttrs(attrs2);
         if (res) {
             if (auto narHash = maybeGetStrAttr(attrs, "narHash"))
-                // FIXME: require SRI hash.
-                res->narHash = newHashAllowEmpty(*narHash, {});
+                res->narHash = Hash::parseSRI(*narHash);
             return res;
         }
     }