diff --git a/db_compare.py b/db_compare.py
index 5fe11eba..d4e1a777 100755
--- a/db_compare.py
+++ b/db_compare.py
@@ -288,7 +288,7 @@ def check_pohadka():
 def check_problem_common():
 	query = "SELECT * FROM seminar_problemy ORDER BY id"
 
-	same_fields = ['id', 'nazev', 'stav', 'autor', 'kod']
+	same_fields = ['id', 'nazev', 'stav', 'autor_id', 'kod']
 	renamed_fields = [
 		('text_org', 'poznamka'),
 		('timestamp', 'vytvoreno'),
@@ -395,7 +395,7 @@ def check_tema():
 
 def check_konfera():
 	old_query = "SELECT * FROM seminar_problemy WHERE typ = 'konfera'"
-	new_query = "SELECT * FROM seminar_konfera JOIN seminar_problemy AS problem ON problem_ptr_id = problem.id"
+	new_query = "SELECT * FROM seminar_konfera AS k JOIN seminar_problemy AS problem ON k.problem_ptr_id = problem.id"
 
 	oldcur.execute(old_query)
 	newcur.execute(new_query)