diff --git a/src/plugins/autotest/boost/boosttestconfiguration.cpp b/src/plugins/autotest/boost/boosttestconfiguration.cpp
index 06e25101686..276c83bc6dd 100644
--- a/src/plugins/autotest/boost/boosttestconfiguration.cpp
+++ b/src/plugins/autotest/boost/boosttestconfiguration.cpp
@@ -120,7 +120,7 @@ QStringList BoostTestConfiguration::argumentsForTestRunner(QStringList *omitted)
     arguments << "--no_color_output"; // ensure that colored output is not used as default
 
     if (boostSettings->randomize)
-        arguments << QString("--random=").append(boostSettings->seed);
+        arguments << QString("--random=").append(QString::number(boostSettings->seed));
 
     if (boostSettings->systemErrors)
         arguments << "-s";