diff --git a/com.intuit.graphql.parent/com.intuit.graphql/src/com/intuit/graphql/validation/GraphQLValidator.java b/com.intuit.graphql.parent/com.intuit.graphql/src/com/intuit/graphql/validation/GraphQLValidator.java
index f5f303c..52b05f6 100644
--- a/com.intuit.graphql.parent/com.intuit.graphql/src/com/intuit/graphql/validation/GraphQLValidator.java
+++ b/com.intuit.graphql.parent/com.intuit.graphql/src/com/intuit/graphql/validation/GraphQLValidator.java
@@ -11,7 +11,7 @@
  * See
  * https://www.eclipse.org/Xtext/documentation/303_runtime_concepts.html#validation
  */
-@ComposedChecks(validators = { DirectiveValidation.class, TypeSystemValidation.class, UnionTypeValidation.class })
+@ComposedChecks(validators = { DirectiveValidation.class, TypeSystemValidation.class, UnionTypeValidation.class, InputValueValidation.class })
 public class GraphQLValidator extends AbstractGraphQLValidator {
 
 //	public static final String INVALID_NAME = "invalidName";
diff --git a/com.intuit.graphql.parent/com.intuit.graphql/src/com/intuit/graphql/validation/InputValueValidation.java b/com.intuit.graphql.parent/com.intuit.graphql/src/com/intuit/graphql/validation/InputValueValidation.java
new file mode 100644
index 0000000..9da4f43
--- /dev/null
+++ b/com.intuit.graphql.parent/com.intuit.graphql/src/com/intuit/graphql/validation/InputValueValidation.java
@@ -0,0 +1,33 @@
+package com.intuit.graphql.validation;
+
+import static com.intuit.graphql.utils.XtextTypeUtils.typeName;
+
+import java.util.Objects;
+
+import org.eclipse.xtext.validation.Check;
+
+import com.intuit.graphql.graphQL.InputObjectTypeDefinition;
+import com.intuit.graphql.graphQL.InputValueDefinition;
+import com.intuit.graphql.graphQL.NamedType;
+import com.intuit.graphql.graphQL.ObjectType;
+
+class InputValueValidation extends BaseValidation {
+	
+	@Check
+	public void checkIfDefaultValuesConfirmsToNameTypes(InputValueDefinition inputValueDefinition) {
+		if (Objects.isNull(inputValueDefinition.getDefaultValue())) {
+			// since no default value exists
+			return;
+		}
+		NamedType namedType = inputValueDefinition.getNamedType();
+		if (!isInputObjectType(namedType)) {
+			error("namedtype " + typeName(namedType) + " not confirms to inputObjectType.", inputValueDefinition);
+		}
+		
+	}
+
+	private boolean isInputObjectType(NamedType namedType) {
+		return namedType instanceof ObjectType && ((ObjectType)namedType).getType() instanceof InputObjectTypeDefinition;
+	}
+
+}