diff --git a/src/gui/application.cpp b/src/gui/application.cpp
index 18b01f6c2df7f..d464713831810 100644
--- a/src/gui/application.cpp
+++ b/src/gui/application.cpp
@@ -608,6 +608,12 @@ void Application::setupLogging()
     logger->setLogExpire(_logExpire > 0 ? _logExpire : ConfigFile().logExpire());
     logger->setLogFlush(_logFlush || ConfigFile().logFlush());
     logger->setLogDebug(_logDebug || ConfigFile().logDebug());
+
+#if defined(QT_DEBUG)
+    logger->setLogDebug(true);
+    logger->setLogFlush(true);
+#endif
+
     if (!logger->isLoggingToFile() && ConfigFile().automaticLogDir()) {
         logger->setupTemporaryFolderLogDir();
     }
diff --git a/src/libsync/logger.cpp b/src/libsync/logger.cpp
index 7a050a1036084..6af8c84d25d0e 100644
--- a/src/libsync/logger.cpp
+++ b/src/libsync/logger.cpp
@@ -85,6 +85,10 @@ Logger::Logger(QObject *parent)
         Logger::instance()->doLog(type, ctx, message);
     });
 #endif
+#if defined(QT_DEBUG)
+    setLogDebug(true);
+    setLogFlush(true);
+#endif
 }
 
 Logger::~Logger()