diff --git a/src/recommender.py b/src/recommender.py
index 9118c6f..365d6f3 100644
--- a/src/recommender.py
+++ b/src/recommender.py
@@ -109,18 +109,20 @@ class Recommender:
         Set the recommendation strategy.
         """
         logging.info("Setting recommender strategy to \'%s\'" % strategy_str)
+        # Check if collaborative strategies can be instanciated
+        if "knn" in strategy_str:
+            if not self.cfg.popcon:
+                logging.info("Cannot perform collaborative strategy")
+                return 1
         if self.cfg.pkgs_filter.split("/")[-1] == "desktopapps":
             self.items_repository = self.axi_desktopapps
             self.valid_pkgs = self.valid_desktopapps
+            if "knn" in strategy_str:
+                self.users_repository = self.popcon_desktopapps
         else:
             self.items_repository = self.axi_programs
             self.valid_pkgs = self.valid_programs
-        # Check if collaborative strategies can be instanciated
-        if ("col" in strategy_str) or ("knn" in strategy_str):
-            if not self.cfg.popcon:
-                logging.info("Cannot perform collaborative strategy")
-                return 1
-            else:
+            if "knn" in strategy_str:
                 self.users_repository = self.popcon_programs
         # Set strategy based on strategy_str
         if strategy_str == "cb":
--
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