diff --git a/qiita_db/study.py b/qiita_db/study.py
index 3c4989f3b..98ddc1ed6 100644
--- a/qiita_db/study.py
+++ b/qiita_db/study.py
@@ -1092,7 +1092,7 @@ def artifacts(self, dtype=None, artifact_type=None):
 
             if artifact_type:
                 sql_args.append(artifact_type)
-                sql_where += "AND artifact_type = %s"
+                sql_where += " AND artifact_type = %s"
 
             sql = """SELECT artifact_id
                      FROM qiita.artifact