diff --git a/lib/APIPlugin.js b/lib/APIPlugin.js
index 9a2bf964f..893fee20a 100644
--- a/lib/APIPlugin.js
+++ b/lib/APIPlugin.js
@@ -46,7 +46,7 @@ const REPLACEMENTS = {
 	__non_webpack_require__: {
 		expr: "require",
 		req: null,
-		type: undefined, // type is not know, depends on environment
+		type: undefined, // type is not known, depends on environment
 		assign: true
 	},
 	__webpack_nonce__: {
@@ -76,7 +76,7 @@ const REPLACEMENTS = {
 	"require.onError": {
 		expr: RuntimeGlobals.uncaughtErrorHandler,
 		req: [RuntimeGlobals.uncaughtErrorHandler],
-		type: undefined, // type is not know, could be function or undefined
+		type: undefined, // type is not known, could be function or undefined
 		assign: true // is never a pattern
 	}
 };