diff --git a/pungi/phases/pkgset/pkgsets.py b/pungi/phases/pkgset/pkgsets.py
index 5ebcd90a..700b7b28 100644
--- a/pungi/phases/pkgset/pkgsets.py
+++ b/pungi/phases/pkgset/pkgsets.py
@@ -165,7 +165,7 @@ class PackageSetBase(kobo.log.LoggingBase):
                     sourcerpm_name = kobo.rpmlib.parse_nvra(i.sourcerpm)["name"]
                     seen_sourcerpms.add(sourcerpm_name)
 
-                self.file_cache[i.file_path] = i
+                self.file_cache.file_cache[i.file_path] = i
                 self.rpms_by_arch[arch].append(i)
 
         self.log_debug("[DONE ] %s" % msg)
diff --git a/tests/test_pkgset_pkgsets.py b/tests/test_pkgset_pkgsets.py
index 3a1d6288..6d6f88f6 100755
--- a/tests/test_pkgset_pkgsets.py
+++ b/tests/test_pkgset_pkgsets.py
@@ -70,6 +70,7 @@ class MockFileCache(dict):
     """
     def __init__(self, _wrapper):
         super(MockFileCache, self).__init__()
+        self.file_cache = self
 
     def add(self, file_path):
         obj = MockFile(file_path)