diff --git a/melodic.tcl b/melodic.tcl
index 33f45ab86cd12fe673bc6173da1b8d584369344f..3aa52a8648b67373e47e1732d5678937727b9294 100644
--- a/melodic.tcl
+++ b/melodic.tcl
@@ -91,7 +91,7 @@ set tempSpin -1
 
 toplevel $w
 
-catch { exec sh -c "${FSLDIR}/bin/melodic -V | grep \[0-9\]" } melodicversion
+catch { exec sh -c "${FSLDIR}/bin/melodic -V | grep '\[0-9\]'" } melodicversion
 set fmri(version) [ lindex $melodicversion 2 ]
 
 wm title      $w $melodicversion