diff --git a/src/generators/typescript/presets/utils/UnmarshalFunction.ts b/src/generators/typescript/presets/utils/UnmarshalFunction.ts
index 9e75d5729e..f4175febab 100644
--- a/src/generators/typescript/presets/utils/UnmarshalFunction.ts
+++ b/src/generators/typescript/presets/utils/UnmarshalFunction.ts
@@ -1,12 +1,14 @@
 import { ClassRenderer } from '../../renderers/ClassRenderer';
 import { getDictionary, getNormalProperties } from '../../../../helpers';
 import {
+  ConstrainedArrayModel,
   ConstrainedDictionaryModel,
   ConstrainedEnumModel,
   ConstrainedMetaModel,
   ConstrainedObjectModel,
   ConstrainedObjectPropertyModel,
-  ConstrainedReferenceModel
+  ConstrainedReferenceModel,
+  ConstrainedUnionModel
 } from '../../../../models';
 
 /**
@@ -22,6 +24,16 @@ function renderUnmarshalProperty(
   ) {
     return `${model.type}.unmarshal(${modelInstanceVariable})`;
   }
+
+  if (
+    model instanceof ConstrainedArrayModel &&
+    !(model.valueModel instanceof ConstrainedUnionModel)
+  ) {
+    return `${modelInstanceVariable} == null
+    ? null
+    : ${modelInstanceVariable}.map((item: any) => ${model.valueModel.type}.unmarshal(item))`;
+  }
+
   return `${modelInstanceVariable}`;
 }
 
diff --git a/test/generators/typescript/preset/__snapshots__/MarshallingPreset.spec.ts.snap b/test/generators/typescript/preset/__snapshots__/MarshallingPreset.spec.ts.snap
index 6e075e4fb0..66ca9c668c 100644
--- a/test/generators/typescript/preset/__snapshots__/MarshallingPreset.spec.ts.snap
+++ b/test/generators/typescript/preset/__snapshots__/MarshallingPreset.spec.ts.snap
@@ -158,7 +158,9 @@ exports[`Marshalling preset should render un/marshal code 1`] = `
       instance.unionArrayTest = obj[\\"unionArrayTest\\"];
     }
     if (obj[\\"arrayTest\\"] !== undefined) {
-      instance.arrayTest = obj[\\"arrayTest\\"];
+      instance.arrayTest = obj[\\"arrayTest\\"] == null
+        ? null
+        : obj[\\"arrayTest\\"].map((item: any) => NestedTest.unmarshal(item));
     }
     if (obj[\\"tupleTest\\"] !== undefined) {
       instance.tupleTest = obj[\\"tupleTest\\"];