diff --git a/lms/envs/common.py b/lms/envs/common.py
index dc748f8482..4e81afe870 100644
--- a/lms/envs/common.py
+++ b/lms/envs/common.py
@@ -184,7 +184,7 @@ if os.path.isdir(DATA_DIR):
         # should no longer be added to STATICFILES
         (course_dir, DATA_DIR / course_dir)
         for course_dir in os.listdir(DATA_DIR)
-        if os.path.isdir(course_dir)
+        if os.path.isdir(DATA_DIR / course_dir)
     ]
 
 # Locale/Internationalization