diff --git a/glafp-utils/runstdtest/runstdtest.prl b/glafp-utils/runstdtest/runstdtest.prl
index 4669fb8303af914c97238fd992c0cda1d5c1bbda..906f503bfc379f02da04cabac9db65e2640b1244 100644
--- a/glafp-utils/runstdtest/runstdtest.prl
+++ b/glafp-utils/runstdtest/runstdtest.prl
@@ -158,7 +158,7 @@ foreach $a ( @PgmArgs ) {
 # deal with system-specific timing options
 $TimingMagic = '';
 if ( $SysSpecificTiming =~ /^ghc/ ) {
-    $TimingMagic = "+RTS -s$StatsFile -RTS"
+    $TimingMagic = "+RTS -S$StatsFile -RTS"
 } elsif ( $SysSpecificTiming eq 'hbc' ) {
     $TimingMagic = "-S$StatsFile";
 }