diff --git a/dvc/dependency/param.py b/dvc/dependency/param.py
index 538e8efb5..311998ff6 100644
--- a/dvc/dependency/param.py
+++ b/dvc/dependency/param.py
@@ -57,8 +57,9 @@ def read_param_file(
     from copy import deepcopy
 
     from dpath import merge
+    from funcy import distinct
 
-    for key_path in key_paths:
+    for key_path in distinct(key_paths):
         merge(
             ret,
             deepcopy(dpath.search(config, key_path, separator=".")),