diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index aacbe5e0b..b9e894a9a 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -441,7 +441,9 @@ string Store::makeValidityRegistration(const StorePathSet & paths,
 
 
 void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const StorePathSet & storePaths,
-    bool includeImpureInfo, bool showClosureSize, AllowInvalidFlag allowInvalid)
+    bool includeImpureInfo, bool showClosureSize,
+    Base hashBase,
+    AllowInvalidFlag allowInvalid)
 {
     auto jsonList = jsonOut.list();
 
@@ -453,7 +455,7 @@ void Store::pathInfoToJSON(JSONPlaceholder & jsonOut, const StorePathSet & store
             auto info = queryPathInfo(storePath);
 
             jsonPath
-                .attr("narHash", info->narHash.to_string())
+                .attr("narHash", info->narHash.to_string(hashBase))
                 .attr("narSize", info->narSize);
 
             {
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index e0484de13..c57a6935e 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -561,6 +561,7 @@ public:
        each path is included. */
     void pathInfoToJSON(JSONPlaceholder & jsonOut, const StorePathSet & storePaths,
         bool includeImpureInfo, bool showClosureSize,
+        Base hashBase = Base32,
         AllowInvalidFlag allowInvalid = DisallowInvalid);
 
     /* Return the size of the closure of the specified path, that is,
diff --git a/src/nix/path-info.cc b/src/nix/path-info.cc
index bffa7b356..45ec297d2 100644
--- a/src/nix/path-info.cc
+++ b/src/nix/path-info.cc
@@ -89,7 +89,7 @@ struct CmdPathInfo : StorePathsCommand, MixJSON
             store->pathInfoToJSON(jsonRoot,
                 // FIXME: preserve order?
                 storePathsToSet(storePaths),
-                true, showClosureSize, AllowInvalid);
+                true, showClosureSize, SRI, AllowInvalid);
         }
 
         else {