diff --git a/src/main/java/io/swagger/codegen/v3/generators/DefaultCodegenConfig.java b/src/main/java/io/swagger/codegen/v3/generators/DefaultCodegenConfig.java
index 62c41a27c5..697c30c6c8 100644
--- a/src/main/java/io/swagger/codegen/v3/generators/DefaultCodegenConfig.java
+++ b/src/main/java/io/swagger/codegen/v3/generators/DefaultCodegenConfig.java
@@ -1276,8 +1276,6 @@ public CodegenModel fromModel(String name, Schema schema, Map<String, Schema> al
         }
         codegenModel.getVendorExtensions().put(CodegenConstants.IS_ALIAS_EXT_NAME, typeAliases.containsKey(name));
 
-        codegenModel.discriminator = schema.getDiscriminator();
-
         if (schema.getXml() != null) {
             codegenModel.xmlPrefix = schema.getXml().getPrefix();
             codegenModel.xmlNamespace = schema.getXml().getNamespace();
@@ -1342,6 +1340,14 @@ else if (schema instanceof ComposedSchema) {
             final List<Schema> allOf = composed.getAllOf();
             // interfaces (intermediate models)
             if (allOf != null && !allOf.isEmpty()) {
+
+                if (schema.getDiscriminator() != null) {
+                    codegenModel.discriminator = schema.getDiscriminator();
+                    if (codegenModel.discriminator != null && codegenModel.discriminator.getPropertyName() != null) {
+                        codegenModel.discriminator.setPropertyName(toVarName(codegenModel.discriminator.getPropertyName()));
+                    }
+                }
+
                 for (int i = 0; i < allOf.size(); i++) {
                     if (i == 0 && !copyFistAllOfProperties) {
                         continue;
diff --git a/src/test/java/io/swagger/codegen/v3/generators/swift/Swift3ModelTest.java b/src/test/java/io/swagger/codegen/v3/generators/swift/Swift3ModelTest.java
index 0b9086d734..129e96c295 100644
--- a/src/test/java/io/swagger/codegen/v3/generators/swift/Swift3ModelTest.java
+++ b/src/test/java/io/swagger/codegen/v3/generators/swift/Swift3ModelTest.java
@@ -31,7 +31,6 @@ public void simpleModelTest() {
         Assert.assertEquals(cm.classname, "Sample");
         Assert.assertEquals(cm.description, "a sample model");
         Assert.assertEquals(cm.vars.size(), 7);
-        Assert.assertEquals(cm.discriminator.getPropertyName(),"test");
 
         final CodegenProperty property1 = cm.vars.get(0);
         Assert.assertEquals(property1.baseName, "id");
@@ -119,8 +118,7 @@ private Schema getSimpleSchema() {
                 .addProperties("uuid", new UUIDSchema())
                 .addProperties("dateOfBirth", new DateSchema())
                 .addRequiredItem("id")
-                .addRequiredItem("name")
-                .discriminator(new Discriminator().propertyName("test"));
+                .addRequiredItem("name");
     }
 
 }
diff --git a/src/test/java/io/swagger/codegen/v3/generators/swift/Swift4ModelTest.java b/src/test/java/io/swagger/codegen/v3/generators/swift/Swift4ModelTest.java
index 3948ab87f4..c4171fde4a 100644
--- a/src/test/java/io/swagger/codegen/v3/generators/swift/Swift4ModelTest.java
+++ b/src/test/java/io/swagger/codegen/v3/generators/swift/Swift4ModelTest.java
@@ -31,7 +31,6 @@ public void simpleModelTest() {
         Assert.assertEquals(cm.classname, "Sample");
         Assert.assertEquals(cm.description, "a sample model");
         Assert.assertEquals(cm.vars.size(), 7);
-        Assert.assertEquals(cm.discriminator.getPropertyName(),"test");
 
         final CodegenProperty property1 = cm.vars.get(0);
         Assert.assertEquals(property1.baseName, "id");
@@ -119,8 +118,7 @@ private Schema getSimpleSchema() {
                 .addProperties("uuid", new UUIDSchema())
                 .addProperties("dateOfBirth", new DateSchema())
                 .addRequiredItem("id")
-                .addRequiredItem("name")
-                .discriminator(new Discriminator().propertyName("test"));
+                .addRequiredItem("name");
     }
 
 }