diff --git a/etc/tools/ParaView4Functions b/etc/tools/ParaView4Functions
index 6b7779b..04323da 100644
--- a/etc/tools/ParaView4Functions
+++ b/etc/tools/ParaView4Functions
@@ -325,7 +325,7 @@ addQtSupport()
         QtMajor=$1
         QtMinor=$2
 
-        if [[ ($QtMajor -lt 4) || ($QtMajor -eq 4 && $QtMinor -lt 5) ]]
+        if [ $QtMajor -lt 4 ] || [ $QtMajor -eq 4 -a $QtMinor -lt 5 ]
         then
             echo "*** Error: Qt version provided < 4.5"
             echo "***     Please use the -qmake option to specify the location of a version of Qt >= 4.5 "