diff --git a/eodag/plugins/search/qssearch.py b/eodag/plugins/search/qssearch.py
index fad445dac..b394472be 100644
--- a/eodag/plugins/search/qssearch.py
+++ b/eodag/plugins/search/qssearch.py
@@ -1428,7 +1428,7 @@ def build_query_string(
             kwargs.setdefault("startTimeFromAscendingNode", "..")
             kwargs.setdefault("completionTimeFromAscendingNode", "..")
 
-        query_params = format_query_params(product_type, self.config, **kwargs)
+        query_params = format_query_params(product_type, self.config, kwargs)
 
         # Build the final query string, in one go without quoting it
         # (some providers do not operate well with urlencoded and quoted query strings)