1 files changed, 1 insertions, 1 deletions
diff --git a/fortran.sh b/fortran.sh
index f8e2191..8df5ccc 100644
--- a/fortran.sh
+++ b/fortran.sh
@@ -1,6 +1,6 @@
 #! /bin/sh
 
-if [[ "${F77}" = "none" && "${F90}" = "none" ]]; then
+if [ "${F77}" = "none" ] && [ "${F90}" = "none" ]; then
     echo 'BEGIN ERROR'
     echo "Fortran thorn requires that a Fortran compiler is defined, but F77 = '$F77' and F90 = '$F90'.  Aborting."
     echo 'END ERROR'