diff --git a/lib/WeBWorK/AchievementItems/ExtendDueDate.pm b/lib/WeBWorK/AchievementItems/ExtendDueDate.pm
index ecc5816b0e..f645c59734 100644
--- a/lib/WeBWorK/AchievementItems/ExtendDueDate.pm
+++ b/lib/WeBWorK/AchievementItems/ExtendDueDate.pm
@@ -79,9 +79,7 @@ sub use_item ($self, $userName, $c) {
 
 	# Change the seed for all of the problems if the set is currently closed.
 	if (after($set->due_date)) {
-		my @probIDs = $db->listUserProblems($userName, $setID);
-		for my $probID (@probIDs) {
-			my $problem = $db->getUserProblem($userName, $setID, $probID);
+		for my $problem ($db->getUserProblemsWhere({ user_id => $userName, set_id => $setID })) {
 			$problem->problem_seed($problem->problem_seed % 2**31 + 1);
 			$db->putUserProblem($problem);
 		}
diff --git a/lib/WeBWorK/AchievementItems/ReducedCred.pm b/lib/WeBWorK/AchievementItems/ReducedCred.pm
index 23a8ff0dc2..297c275d7e 100644
--- a/lib/WeBWorK/AchievementItems/ReducedCred.pm
+++ b/lib/WeBWorK/AchievementItems/ReducedCred.pm
@@ -85,9 +85,7 @@ sub use_item ($self, $userName, $c) {
 
 	# Change the seed for all of the problems if the set is currently closed.
 	if (after($set->due_date)) {
-		my @probIDs = $db->listUserProblems($userName, $setID);
-		for my $probID (@probIDs) {
-			my $problem = $db->getUserProblem($userName, $setID, $probID);
+		for my $problem ($db->getUserProblemsWhere({ user_id => $userName, set_id => $setID })) {
 			$problem->problem_seed($problem->problem_seed % 2**31 + 1);
 			$db->putUserProblem($problem);
 		}
diff --git a/lib/WeBWorK/AchievementItems/SuperExtendDueDate.pm b/lib/WeBWorK/AchievementItems/SuperExtendDueDate.pm
index eb9cf88da1..ccf960321d 100644
--- a/lib/WeBWorK/AchievementItems/SuperExtendDueDate.pm
+++ b/lib/WeBWorK/AchievementItems/SuperExtendDueDate.pm
@@ -79,9 +79,7 @@ sub use_item ($self, $userName, $c) {
 
 	# Change the seed for all of the problems if the set is currently closed.
 	if (after($set->due_date)) {
-		my @probIDs = $db->listUserProblems($userName, $setID);
-		for my $probID (@probIDs) {
-			my $problem = $db->getUserProblem($userName, $setID, $probID);
+		for my $problem ($db->getUserProblemsWhere({ user_id => $userName, set_id => $setID })) {
 			$problem->problem_seed($problem->problem_seed % 2**31 + 1);
 			$db->putUserProblem($problem);
 		}