diff --git a/src/MAKE/Makefile.tbird2 b/src/MAKE/Makefile.tbird2
index ecbc986d88..71934d6d36 100644
--- a/src/MAKE/Makefile.tbird2
+++ b/src/MAKE/Makefile.tbird2
@@ -7,6 +7,7 @@ SHELL = /bin/sh
 
 # openmpi on tbird does not work correctly with LAMMPS
 # mvapich should be used
+# mpiexec should be used
 #
 # Before building Lammps on tbird, do the following two module commands:
 #     "module switch mpi mpi/mvapich-0.9.8-ofed-intel-9.1"
@@ -17,8 +18,10 @@ SHELL = /bin/sh
 #     "source /opt/modules/3.1.6/init/bash"
 #     "module switch mpi mpi/mvapich-0.9.8-ofed-intel-9.1"
 #     "module load libraries/fftw-2.1.5-openmpi-1.1.2-ofed-intel-9.1" 
-# If bash is not interactive shell, or the one specified in your NQS script,
-#    substitute another shell name for bash
+#
+# If bash is not your interactive shell,
+#    or what is specified in your NQS script,
+#    substitute another shell name for bash in the "source" line
 
 CC =		mpicxx
 CCFLAGS =	-O -DFFT_FFTW -I${FFTW_INCLUDE}