diff --git a/src/utils/should-consolidate-types.ts b/src/utils/should-consolidate-types.ts
index 9f07fce..1ba4768 100644
--- a/src/utils/should-consolidate-types.ts
+++ b/src/utils/should-consolidate-types.ts
@@ -71,7 +71,13 @@ function typesAreEquivalent(
     const matchingInputField = inputNode.astNode?.fields?.find(
       (inputField) => inputField.name.value === typeField.name.value,
     );
-    if (!matchingInputField?.type) return false;
+    if (
+      !matchingInputField?.type ||
+      typeField.type.kind !== matchingInputField.type.kind
+    ) {
+      return false;
+    }
+
     const baseTypeName = getBaseTypeNode(typeField.type).name.value;
     const baseInputTypeName = getBaseTypeNode(matchingInputField.type).name
       .value;
diff --git a/test/unit/should_consolidate_input_and_output_types/expected.kt b/test/unit/should_consolidate_input_and_output_types/expected.kt
index 8a34614..c501d82 100644
--- a/test/unit/should_consolidate_input_and_output_types/expected.kt
+++ b/test/unit/should_consolidate_input_and_output_types/expected.kt
@@ -128,3 +128,17 @@ enum class Enum2 {
         fun findByName(name: String, ignoreCase: Boolean = false): Enum2? = values().find { it.name.equals(name, ignoreCase = ignoreCase) }
     }
 }
+
+@GraphQLValidObjectLocations(locations = [GraphQLValidObjectLocations.Locations.OBJECT])
+data class MyNullabilityType(
+    val field1: MyNestedNullabilityType
+)
+
+@GraphQLValidObjectLocations(locations = [GraphQLValidObjectLocations.Locations.INPUT_OBJECT])
+data class MyNullabilityTypeInput(
+    val field1: MyNestedNullabilityType? = null
+)
+
+data class MyNestedNullabilityType(
+    val field2: String
+)
diff --git a/test/unit/should_consolidate_input_and_output_types/schema.graphql b/test/unit/should_consolidate_input_and_output_types/schema.graphql
index 5980638..86a0d79 100644
--- a/test/unit/should_consolidate_input_and_output_types/schema.graphql
+++ b/test/unit/should_consolidate_input_and_output_types/schema.graphql
@@ -131,6 +131,8 @@ input MySuperSetTypeInput {
   field3: Int
 }
 
+# case where fields are different enum types
+
 type MyTypeWithEnums {
   field1: [Enum1!]
   field2: [Enum2!]
@@ -149,3 +151,21 @@ enum Enum1 {
 enum Enum2 {
   THE_OTHER
 }
+
+# case where fields have different nullability
+
+type MyNullabilityType {
+  field1: MyNestedNullabilityType!
+}
+
+input MyNullabilityTypeInput {
+  field1: MyNestedNullabilityTypeInput
+}
+
+type MyNestedNullabilityType {
+  field2: String!
+}
+
+input MyNestedNullabilityTypeInput {
+  field2: String!
+}