diff --git a/devel/moth.py b/devel/moth.py
index a1dd7de..580ceb6 100644
--- a/devel/moth.py
+++ b/devel/moth.py
@@ -85,7 +85,7 @@ class Puzzle:
         self.objective = None  # Text describing the expected learning outcome from solving this puzzle, *why* are you solving this puzzle
         self.success = None  # Text describing criteria for different levels of success, e.g. {"Acceptable": "Did OK", "Mastery": "Did even better"}
         self.solution = None  # Text describing how to solve the puzzle
-        self.ksa = []  # A list of references to related NICE KSAs (e.g. K0058, . . .)
+        self.ksas = []  # A list of references to related NICE KSAs (e.g. K0058, . . .)
 
         self.logs = []
         self.randseed = category_seed * self.points
@@ -142,7 +142,7 @@ class Puzzle:
                 elif key == "solution":
                     self.solution = val
                 elif key == "ksa":
-                    self.ksa.append(val)
+                    self.ksas.append(val)
                 else:
                     raise ValueError("Unrecognized header field: {}".format(key))
             else:
@@ -296,7 +296,7 @@ class Puzzle:
             'objective': self.objective,
             'success': self.success,
             'solution': self.solution,
-            'ksa': self.ksa,
+            'ksas': self.ksas,
         }
 
     def hashes(self):