diff --git a/NEWS.md b/NEWS.md
index bdb4d2c7..8fbe5cbe 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -20,6 +20,7 @@ Red Panda C++ Version 2.16
   - fix: Shouldn't try evaluate value of the selection in the cpu info dialog.
   - enhancement: Show oct/bin/bin value in the memory view's tooltip.
   - fix: Hex float point literal is not correctly colored.
+  - fix: Problem's memory limit unit can't be correctly saved.
 
 Red Panda C++ Version 2.15
 
diff --git a/RedPandaIDE/widgets/ojproblempropertywidget.cpp b/RedPandaIDE/widgets/ojproblempropertywidget.cpp
index e0a1e4c8..63d973d4 100644
--- a/RedPandaIDE/widgets/ojproblempropertywidget.cpp
+++ b/RedPandaIDE/widgets/ojproblempropertywidget.cpp
@@ -79,13 +79,13 @@ void OJProblemPropertyWidget::saveToProblem(POJProblem problem)
     problem->description = ui->txtDescription->toHtml();
     problem->memoryLimit = ui->spinMemoryLimit->value();
     problem->timeLimit = ui->spinTimeLimit->value();
-    if (ui->cbTimeLimitUnit->currentText()=="sec")
+    if (ui->cbTimeLimitUnit->currentText()==tr("sec"))
         problem->timeLimitUnit = ProblemTimeLimitUnit::Seconds;
     else
         problem->timeLimitUnit = ProblemTimeLimitUnit::Milliseconds;
-    if (ui->cbTimeLimitUnit->currentText()=="KB")
+    if (ui->cbMemoryLimitUnit->currentText()==tr("KB"))
         problem->memoryLimitUnit = ProblemMemoryLimitUnit::KB;
-    else if (ui->cbTimeLimitUnit->currentText()=="MB")
+    else if (ui->cbMemoryLimitUnit->currentText()==tr("MB"))
         problem->memoryLimitUnit = ProblemMemoryLimitUnit::MB;
     else
         problem->memoryLimitUnit = ProblemMemoryLimitUnit::GB;