diff --git a/src/NiivueMutator.ts b/src/NiivueMutator.ts
index b654def..a46bfd2 100644
--- a/src/NiivueMutator.ts
+++ b/src/NiivueMutator.ts
@@ -58,7 +58,15 @@ class NiivueMutator {
          */
         const setter = this.optionUpdateFunctionMap[key];
         if (setter !== undefined) {
-          setter(value);
+          try {
+            setter(value);
+          } catch (e) {
+            if (e instanceof Error && e.message === 'this.crosshairs3D is null') {
+              console.warn('Caught error which was fixed in https://github.com/niivue/niivue/pull/864, please update Niivue.');
+            } else {
+              throw e;
+            }
+          }
         } else if (key in this.nv.opts) {
           // @ts-ignore
           this.nv.opts[key] = value;
diff --git a/src/setters.ts b/src/setters.ts
index 1985252..3f49a28 100644
--- a/src/setters.ts
+++ b/src/setters.ts
@@ -13,7 +13,6 @@ type OptionUpdateFunctionMap = {
  */
 function optionUpdateFunctionMap(nv: Niivue): OptionUpdateFunctionMap {
   const mapping = {
-    // FIXME nv.setCrosshairWidth and nv.setCrosshairColor should NOT be called if nv.crosshairs3D is null!
     crosshairWidth: nv.setCrosshairWidth,
     crosshairColor: nv.setCrosshairColor,
     sliceType: nv.setSliceType,