diff --git a/.travis-before-install.sh b/.travis-before-install.sh
index 4d3dad82c..e59d9b704 100755
--- a/.travis-before-install.sh
+++ b/.travis-before-install.sh
@@ -8,5 +8,5 @@ else
   # Linux.
   sudo apt-get update
   sudo apt-get -y install qt57tools qt57base qt57webengine
-  source /opt/qt57/bin/qt57-env.sh
+  . /opt/qt57/bin/qt57-env.sh
 fi
\ No newline at end of file