diff --git a/module/actor/actor.js b/module/actor/actor.js
index d3e2bda..0521820 100644
--- a/module/actor/actor.js
+++ b/module/actor/actor.js
@@ -33,7 +33,19 @@ export class DeltaGreenActor extends Actor {
       // the x5 is just whatever the raw statistic is x 5 to turn it into a d100 percentile
       statistic.x5 = statistic.value * 5;
     }
-    //console.log(data.statistics);
+    
+    // The unnatural skill is sort of special
+    // It cannot be improved via failure, so add in a special property to reflect this
+    // Mostly to make it easy to deactivate the failure checkbox in the GUI
+    for (let [key, skill] of Object.entries(data.skills)){
+      if(key === 'unnatural'){
+        skill.cannotBeImprovedByFailure = true;
+      }
+      else{
+        skill.cannotBeImprovedByFailure = false;
+      }
+    }
+
     console.log(actorData);
     actorData.data.wp.max = actorData.data.statistics.pow.value;
 
diff --git a/templates/actor/actor-sheet.html b/templates/actor/actor-sheet.html
index c75719d..ab1d7c1 100644
--- a/templates/actor/actor-sheet.html
+++ b/templates/actor/actor-sheet.html
@@ -99,7 +99,7 @@
               <div class="statistic flexrow flex-group-center">
                 <label class="rollable skill-label" data-roll="d100" data-target="{{skill.proficiency}}" data-label="{{skill.label}}" title="Click to roll a skill check."  for="data.skills.{{key}}.value" class="resource-label">{{skill.label}}</label>
                 <input type="text" name="data.skills.{{key}}.proficiency" value="{{skill.proficiency}}" data-dtype="Number"/>
-                <input type="checkbox" name="data.skills.{{key}}.failure" {{checked skill.failure}} data-dtype="Boolean" />
+                <input type="checkbox" name="data.skills.{{key}}.failure" {{checked skill.failure}} data-dtype="Boolean" {{#if skill.cannotBeImprovedByFailure}} disabled {{/if}} }} />
               </div>
             {{/each}}
           </div>