diff --git a/app-wear-shared/shared/src/main/java/info/nightscout/rx/weardata/CustomWatchfaceFormat.kt b/app-wear-shared/shared/src/main/java/info/nightscout/rx/weardata/CustomWatchfaceFormat.kt
index 4be5b5e5a5..010c9ca095 100644
--- a/app-wear-shared/shared/src/main/java/info/nightscout/rx/weardata/CustomWatchfaceFormat.kt
+++ b/app-wear-shared/shared/src/main/java/info/nightscout/rx/weardata/CustomWatchfaceFormat.kt
@@ -63,7 +63,8 @@ enum class ResFormat(val extension: String) {
     SVG("svg"),
     JPG("jpg"),
     PNG("png"),
-    TTF("ttf");
+    TTF("ttf"),
+    OTF("otf");
 
     companion object {
 
@@ -102,7 +103,7 @@ data class ResData(val value: ByteArray, val format: ResFormat) {
     fun toTypeface(): Typeface? {
         try {
             return when (format) {
-                ResFormat.TTF -> {
+                ResFormat.TTF, ResFormat.OTF -> {
                     // Workaround with temporary File, Typeface.createFromFileDescriptor(null, value, 0, value.size) more simple not available
                     File.createTempFile("temp", format.extension).let { tempFile ->
                         FileOutputStream(tempFile).let { fileOutputStream ->
diff --git a/wear/src/main/java/info/nightscout/androidaps/watchfaces/CustomWatchface.kt b/wear/src/main/java/info/nightscout/androidaps/watchfaces/CustomWatchface.kt
index ca92b2c254..e82642e0a1 100644
--- a/wear/src/main/java/info/nightscout/androidaps/watchfaces/CustomWatchface.kt
+++ b/wear/src/main/java/info/nightscout/androidaps/watchfaces/CustomWatchface.kt
@@ -554,7 +554,7 @@ private enum class FontMap(val key: String, var font: Typeface, @FontRes val fon
                 } ?: fontMap.font
             }
             resDataMap.filter { (_, resData) ->
-                resData.format == ResFormat.TTF
+                resData.format == ResFormat.TTF || resData.format == ResFormat.OTF
             }.forEach { (key, resData) ->
                 customFonts[key.lowercase()] = resData.toTypeface() ?:Typeface.DEFAULT
             }