diff --git a/src/components/font_control/font_control.js b/src/components/font_control/font_control.js
index a66e1b88c..d7c5aa225 100644
--- a/src/components/font_control/font_control.js
+++ b/src/components/font_control/font_control.js
@@ -27,7 +27,6 @@ export default {
   },
   emits: ['update:modelValue'],
   data() {
-    console.log(this.fallback)
     return {
       manualEntry: false,
       availableOptions: [
@@ -46,7 +45,7 @@ export default {
   },
   computed: {
     present() {
-      return this.modelValue != null
+      return typeof this.modelValue !== 'undefined'
     },
     localFontsList() {
       return useInterfaceStore().localFonts
diff --git a/src/components/font_control/font_control.vue b/src/components/font_control/font_control.vue
index 62f8d052d..26833b9de 100644
--- a/src/components/font_control/font_control.vue
+++ b/src/components/font_control/font_control.vue
@@ -6,7 +6,7 @@
         :id="name + '-o'"
         class="font-checkbox setting-control setting-label"
         :model-value="present"
-        @change="$emit('update:modelValue', modelValue == null ? fallback : null)"
+        @change="$emit('update:modelValue', typeof modelValue === 'undefined' ? fallback : undefined)"
       >
         <LocalSettingIndicator />
         {{ ' ' }}
diff --git a/src/modules/default_config_state.js b/src/modules/default_config_state.js
index 5af6f6c5e..fd75701cf 100644
--- a/src/modules/default_config_state.js
+++ b/src/modules/default_config_state.js
@@ -620,22 +620,22 @@ export const LOCAL_DEFAULT_CONFIG_DEFINITIONS = {
   },
   fontInterface: {
     description: 'Interface font override',
-    type: 'object',
+    type: 'string',
     default: null,
   },
   fontInput: {
     description: 'Input font override',
-    type: 'object',
+    type: 'string',
     default: null,
   },
   fontPosts: {
     description: 'Post font override',
-    type: 'object',
+    type: 'string',
     default: null,
   },
   fontMonospace: {
     description: 'Monospace font override',
-    type: 'object',
+    type: 'string',
     default: null,
   },
   themeDebug: {