diff --git a/repos_cmp/repos.py b/repos_cmp/repos.py
index 7ca722c..f613ec0 100644
--- a/repos_cmp/repos.py
+++ b/repos_cmp/repos.py
@@ -201,6 +201,10 @@ class Repository:
             if item[0].is_provide_for(dependency):
                 yield item
 
+    def source_for_dependency(self, dependency):
+        return [dep[1].source_rpm
+                for dep in self.reverse_prov[dependency]]
+
     def _unmets(self, packages):
         result = []
         for pkg in packages: