diff --git a/lib/extension/bridge.ts b/lib/extension/bridge.ts
index fc68f87b07..88d1d89fc0 100644
--- a/lib/extension/bridge.ts
+++ b/lib/extension/bridge.ts
@@ -434,7 +434,7 @@ export default class Bridge extends Extension {
         const oldOptions = objectAssignDeep({}, cleanup(entity.options));
 
         if (message.options.icon) {
-            const base64Match = utils.isBase64File(message.options.icon);
+            const base64Match = utils.matchBase64File(message.options.icon);
             if (base64Match) {
                 const fileSettings = utils.saveBase64DeviceIcon(base64Match);
                 message.options.icon = fileSettings;
diff --git a/lib/util/settings.ts b/lib/util/settings.ts
index 63e08b8981..9a3da3e880 100644
--- a/lib/util/settings.ts
+++ b/lib/util/settings.ts
@@ -246,7 +246,7 @@ export function validate(): string[] {
         if (names.includes(e.friendly_name)) errors.push(`Duplicate friendly_name '${e.friendly_name}' found`);
         errors.push(...utils.validateFriendlyName(e.friendly_name));
         names.push(e.friendly_name);
-        if ('icon' in e && e.icon && !utils.isBase64File(e.icon) && !e.icon.startsWith('device_icons/')) {
+        if ('icon' in e && e.icon && !utils.matchBase64File(e.icon) && !e.icon.startsWith('device_icons/')) {
             errors.push(`Device icon of '${e.friendly_name}' should start with 'device_icons/', got '${e.icon}'`);
         }
         if (e.qos != null && ![0, 1, 2].includes(e.qos)) {
diff --git a/lib/util/settingsMigration.ts b/lib/util/settingsMigration.ts
index 7aa45ae1e1..56908fe994 100644
--- a/lib/util/settingsMigration.ts
+++ b/lib/util/settingsMigration.ts
@@ -460,7 +460,7 @@ function migrateToFour(
         const [validPath, previousValue] = getValue(currentSettings, ['devices']);
 
         for (const deviceKey in currentSettings.devices) {
-            const base64Match = utils.isBase64File(currentSettings.devices[deviceKey].icon ?? '');
+            const base64Match = utils.matchBase64File(currentSettings.devices[deviceKey].icon ?? '');
             if (base64Match) {
                 currentSettings.devices[deviceKey].icon = utils.saveBase64DeviceIcon(base64Match);
             }
diff --git a/lib/util/utils.ts b/lib/util/utils.ts
index 71d6ba82a9..6b3a6c91c7 100644
--- a/lib/util/utils.ts
+++ b/lib/util/utils.ts
@@ -375,7 +375,7 @@ function deviceNotCoordinator(device: zh.Device): boolean {
     return device.type !== 'Coordinator';
 }
 
-function isBase64File(value: string): {extension: string; data: string} | false {
+function matchBase64File(value: string): {extension: string; data: string} | false {
     const match = value.match(BASE64_IMAGE_REGEX);
     if (match) {
         assert(match.groups?.extension && match.groups?.data);
@@ -397,7 +397,7 @@ function saveBase64DeviceIcon(base64Match: {extension: string; data: string}): s
 const noop = (): void => {};
 
 export default {
-    isBase64File,
+    matchBase64File,
     saveBase64DeviceIcon,
     capitalize,
     getZigbee2MQTTVersion,