diff --git a/src/TextDecorator.js b/src/TextDecorator.js
index 79a70347f..00b66eec1 100644
--- a/src/TextDecorator.js
+++ b/src/TextDecorator.js
@@ -109,7 +109,7 @@ class TextDecorator {
 				y += lineAscent - (ascent * 0.25);
 				break;
 			default:
-				throw new Error(`Unkown decoration : ${group.decoration}`);
+				throw new Error(`Unknown decoration : ${group.decoration}`);
 		}
 		this.pdfDocument.save();