diff --git a/doc/python_api/conf.py b/doc/python_api/conf.py
index 02f95930ae2..0fe27d0c991 100644
--- a/doc/python_api/conf.py
+++ b/doc/python_api/conf.py
@@ -12,7 +12,7 @@ BLENDER_REVISION = "${BLENDER_REVISION}"
 BLENDER_REVISION_TIMESTAMP = "${BLENDER_REVISION_TIMESTAMP}"
 BLENDER_VERSION_DATE = time.strftime(
     "%d/%m/%Y",
-    time.localtime(BLENDER_REVISION_TIMESTAMP if BLENDER_REVISION_TIMESTAMP != "0" else None),
+    time.localtime(int(BLENDER_REVISION_TIMESTAMP) if BLENDER_REVISION_TIMESTAMP != "0" else None),
 )
 
 if BLENDER_REVISION != "Unknown":