diff --git a/.changelog/36691.txt b/.changelog/36691.txt
new file mode 100644
index 00000000000..c5172fa9a15
--- /dev/null
+++ b/.changelog/36691.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+resource/aws_ecs_service: Correctly set `alarms.rollback` on resource Create and Update
+```
\ No newline at end of file
diff --git a/internal/service/ecs/service.go b/internal/service/ecs/service.go
index ea54a14b10a..d1577068831 100644
--- a/internal/service/ecs/service.go
+++ b/internal/service/ecs/service.go
@@ -1156,7 +1156,7 @@ func expandAlarms(tfMap map[string]interface{}) *ecs.DeploymentAlarms {
 		apiObject.Enable = aws.Bool(v)
 	}
 
-	if v, ok := tfMap["enable"].(bool); ok {
+	if v, ok := tfMap["rollback"].(bool); ok {
 		apiObject.Rollback = aws.Bool(v)
 	}