diff --git a/src/tools/build/adjust-encoding.js b/src/tools/build/adjust-encoding.js
index 2de7e7d..950b513 100644
--- a/src/tools/build/adjust-encoding.js
+++ b/src/tools/build/adjust-encoding.js
@@ -6,7 +6,7 @@ export function getEncoding(buffer)
 {
 	const result = jscharder.detect(buffer);
 
-	if (!result || result.encoding === 'UTF-8')
+	if (!result || result.encoding === 'UTF-8' || result.encoding === 'ascii')
 	{
 		return 'utf-8';
 	}