diff --git a/src/domain.py b/src/domain.py
index c4c8d0160..974a8d72c 100644
--- a/src/domain.py
+++ b/src/domain.py
@@ -385,6 +385,8 @@ def domain_main_domain(operation_logger, new_main_domain=None):
         domain_list_cache = {}
         _set_hostname(new_main_domain)
     except Exception as e:
+        import traceback
+        traceback.print_exc()
         logger.warning(str(e), exc_info=1)
         raise YunohostError("main_domain_change_failed")
 
@@ -392,6 +394,8 @@ def domain_main_domain(operation_logger, new_main_domain=None):
     try:
         app_ssowatconf()
     except Exception as e:
+        import traceback
+        traceback.print_exc()
         logger.warning(str(e), exc_info=1)
         raise YunohostError("main_domain_change_failed")