diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/okhttp/OkHttpDebugLogging.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/okhttp/OkHttpDebugLogging.kt
index 367627357..e3c48929d 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/okhttp/OkHttpDebugLogging.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/okhttp/OkHttpDebugLogging.kt
@@ -23,6 +23,7 @@ package com.vitorpamplona.amethyst.service.okhttp
 import okhttp3.internal.concurrent.TaskRunner
 import okhttp3.internal.http2.Http2
 import java.io.Closeable
+import java.util.Locale
 import java.util.concurrent.CopyOnWriteArraySet
 import java.util.logging.ConsoleHandler
 import java.util.logging.Handler
@@ -45,7 +46,7 @@ object OkHttpDebugLogging {
             level = Level.FINE
             formatter =
                 object : SimpleFormatter() {
-                    override fun format(record: LogRecord) = String.format("[%1\$tF %1\$tT] %2\$s %n", record.millis, record.message)
+                    override fun format(record: LogRecord) = String.format(Locale.ROOT, $$"[%1$tF %1$tT] %2$s %n", record.millis, record.message)
                 }
         }