diff --git a/lib/sinon/colorizer.js b/lib/sinon/colorizer.js
index 242517990..93bda6a96 100644
--- a/lib/sinon/colorizer.js
+++ b/lib/sinon/colorizer.js
@@ -12,7 +12,7 @@ module.exports = class Colorizer {
      * @private
      */
     colorize(str, color) {
-        if (this.supportsColor.stdout === false) {
+        if (!this.supportsColor || !this.supportsColor.stdout) {
             return str;
         }