diff --git a/packages/patternfly-4/react-core/src/components/Select/Select.d.ts b/packages/patternfly-4/react-core/src/components/Select/Select.d.ts
index 04f8a94e358..e18fb7a1032 100644
--- a/packages/patternfly-4/react-core/src/components/Select/Select.d.ts
+++ b/packages/patternfly-4/react-core/src/components/Select/Select.d.ts
@@ -6,9 +6,9 @@ export interface SelectProps extends Omit<HTMLProps<HTMLInputElement>, 'onChange
   value?: any;
   isValid?: boolean;
   isDisabled?: boolean;
-  onBlur(event: React.FormEvent<HTMLSelectElement>): void;
-  onFocus(event: React.FormEvent<HTMLSelectElement>): void;
-  onChange(event: React.FormEvent<HTMLSelectElement>): void;
+  onBlur?(event: React.FormEvent<HTMLSelectElement>): void;
+  onFocus?(event: React.FormEvent<HTMLSelectElement>): void;
+  onChange?(event: React.FormEvent<HTMLSelectElement>): void;
 }
 
 declare const Select: React.SFC<SelectProps>;
diff --git a/packages/patternfly-4/react-core/src/components/TextInput/TextInput.d.ts b/packages/patternfly-4/react-core/src/components/TextInput/TextInput.d.ts
index d5660b8d528..ea1b109aef3 100644
--- a/packages/patternfly-4/react-core/src/components/TextInput/TextInput.d.ts
+++ b/packages/patternfly-4/react-core/src/components/TextInput/TextInput.d.ts
@@ -9,7 +9,7 @@ export interface TextInputProps extends Omit<HTMLProps<HTMLInputElement>, 'type'
   isValid?: boolean;
   isDisabled?: boolean;
   isAlt?: boolean;
-  onChange(checked: boolean, event: FormEvent<HTMLInputElement>): void;
+  onChange?(checked: boolean, event: FormEvent<HTMLInputElement>): void;
   isReadOnly?: boolean;
   'aria-label'?: string;
 }