diff --git a/packages/core/__tests__/core.test.ts b/packages/core/__tests__/core.test.ts
index 2928788d7f..ffdcbf0a87 100644
--- a/packages/core/__tests__/core.test.ts
+++ b/packages/core/__tests__/core.test.ts
@@ -193,10 +193,12 @@ describe('@actions/core', () => {
 
   it('getInput gets non-required input', () => {
     expect(core.getInput('my input')).toBe('val')
+    expect(core.getInput('my-input')).toBe('val')
   })
 
   it('getInput gets required input', () => {
     expect(core.getInput('my input', {required: true})).toBe('val')
+    expect(core.getInput('my-input', {required: true})).toBe('val')
   })
 
   it('getInput throws on missing required input', () => {
diff --git a/packages/core/src/core.ts b/packages/core/src/core.ts
index e9091ba206..603d661cd4 100644
--- a/packages/core/src/core.ts
+++ b/packages/core/src/core.ts
@@ -150,7 +150,7 @@ export function addPath(inputPath: string): void {
  */
 export function getInput(name: string, options?: InputOptions): string {
   const val: string =
-    process.env[`INPUT_${name.replace(/ /g, '_').toUpperCase()}`] || ''
+    process.env[`INPUT_${name.replace(/[- ]/g, '_').toUpperCase()}`] || ''
   if (options && options.required && !val) {
     throw new Error(`Input required and not supplied: ${name}`)
   }