diff --git a/caremyway/api/serializers.py b/caremyway/api/serializers.py
index 5a79ae0..4ac7f6e 100644
--- a/caremyway/api/serializers.py
+++ b/caremyway/api/serializers.py
@@ -264,8 +264,8 @@ class CShiftSerializer(ShiftSerializer):
             instance.set_end = set_end
 
         elif approved_start and approved_end:
-            if not instance.actual_end:
-                raise serializers.ValidationError("Can't approve / edit time until after checkout.")
+            if not instance.actual_start:
+                raise serializers.ValidationError("Can't approve / edit time until after checkin.")
 
             if approved_start > approved_end:
                 raise serializers.ValidationError("Shift ends before it starts.")