diff --git a/superset/db_engine_specs/sqlite.py b/superset/db_engine_specs/sqlite.py
index cf2f0f9e2..9a4986b0c 100644
--- a/superset/db_engine_specs/sqlite.py
+++ b/superset/db_engine_specs/sqlite.py
@@ -44,7 +44,7 @@ class SqliteEngineSpec(BaseEngineSpec):
         "PT1M": "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:00', {col}))",
         "PT1H": "DATETIME(STRFTIME('%Y-%m-%dT%H:00:00', {col}))",
         "P1D": "DATE({col})",
-        "P1W": "DATE({col}, -strftime('%W', {col}) || ' days')",
+        "P1W": "DATE({col}, -strftime('%w', {col}) || ' days')",
         "P1M": "DATE({col}, -strftime('%d', {col}) || ' days', '+1 day')",
         "P0.25Y": (
             "DATETIME(STRFTIME('%Y-', {col}) || "  # year