diff --git a/src/buildPronoun.js b/src/buildPronoun.js
index b88509c00..8d3b96b26 100644
--- a/src/buildPronoun.js
+++ b/src/buildPronoun.js
@@ -44,10 +44,8 @@ const buildPronounFromTemplate = (key, template) => {
         template.description,
         template.normative || false,
         buildDict(function*(morphemes) {
-            for (const k in morphemes) {
-                if (morphemes.hasOwnProperty(k)) {
-                    yield [k, buildMorphemeFromTemplate(key, morphemes[k])];
-                }
+            for (const m of MORPHEMES) {
+                yield [m, Object.hasOwn(morphemes, m) ? buildMorphemeFromTemplate(key, morphemes[m]) : null];
             }
         }, template.morphemes),
         [template.plural || false],
diff --git a/test/buildPronoun.test.js b/test/buildPronoun.test.js
index c8f2b435a..de91da927 100644
--- a/test/buildPronoun.test.js
+++ b/test/buildPronoun.test.js
@@ -130,6 +130,40 @@ describe('when configured that null pronouns are available', () => {
             expect(buildPronoun(pronouns, `:${name}`, translator).morphemes.possessive_pronoun).toBe(`${name}s`);
         });
     });
+
+    describe('when some morphemes are not defined in template', () => {
+        beforeEach(() => {
+            global.config.pronouns.null = {
+                morphemes: {
+                    pronoun_subject: '#',
+                    pronoun_object: '#',
+                    possessive_determiner: '#\'s',
+                    possessive_pronoun: '#\'s',
+                },
+            };
+        });
+        test('they become null', () => {
+            const actual = expect(buildPronoun(pronouns, ':S', translator));
+            actual.toBeDefined();
+            actual.toEqual(new Pronoun(
+                'S',
+                '',
+                false,
+                {
+                    pronoun_subject: 'S',
+                    pronoun_object: 'S',
+                    possessive_determiner: 'S\'s',
+                    possessive_pronoun: 'S\'s',
+                    reflexive: null,
+                },
+                [false],
+                [false],
+                [],
+                '__generator__',
+                false,
+            ));
+        });
+    });
 });
 
 describe('when configured that slashes contain all morphemes', () => {