diff --git a/src/core/icc_colorspace.js b/src/core/icc_colorspace.js
index b8ed91a6f..a94c85c75 100644
--- a/src/core/icc_colorspace.js
+++ b/src/core/icc_colorspace.js
@@ -48,9 +48,7 @@ class IccColorSpace extends ColorSpace {
 
   static #wasmUrl = null;
 
-  static #finalizer = new FinalizationRegistry(transformer => {
-    qcms_drop_transformer(transformer);
-  });
+  static #finalizer = null;
 
   constructor(iccProfile, name, numComps) {
     if (!IccColorSpace.isUsable) {
@@ -100,6 +98,9 @@ class IccColorSpace extends ColorSpace {
     if (!this.#transformer) {
       throw new Error("Failed to create ICC color space");
     }
+    IccColorSpace.#finalizer ||= new FinalizationRegistry(transformer => {
+      qcms_drop_transformer(transformer);
+    });
     IccColorSpace.#finalizer.register(this, this.#transformer);
   }