diff --git a/make_for_gcc.sh b/make_for_gcc.sh
index 531400e459fc9fc62311c413299bb41903dbe1e5..cb6c1218e079e9bab2fe88155858cc7a5d561a44 100755
--- a/make_for_gcc.sh
+++ b/make_for_gcc.sh
@@ -1,4 +1,5 @@
-#!/bin/sh 
+#!/bin/bash
+# not sh since on Ubuntu sh is not bash
 set -x # for debugging
 
 if [ $# -ne 1 ] 
@@ -35,7 +36,6 @@ fi
 if [ $1 == "opt" ]
 then 
 F77=gfortran ./configure --prefix=$dir/$TRACY/tracy FFLAGS="-O2  -Wall -fbounds-check" CFLAGS="-O2  -Wall -fno-implicit-templates" CXXFLAGS="-O2  -Wall -fno-implicit-templates"
-
 fi
 
 make