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-rwxr-xr-xshare/spack/setup-env.sh2
1 files changed, 1 insertions, 1 deletions
diff --git a/share/spack/setup-env.sh b/share/spack/setup-env.sh
index 586a5b836b..764af68400 100755
--- a/share/spack/setup-env.sh
+++ b/share/spack/setup-env.sh
@@ -141,7 +141,7 @@ function _spack_pathadd {
fi
# Do the actual prepending here.
- eval "_pa_oldvalue=\$${_pa_varname}"
+ eval "_pa_oldvalue=\${${_pa_varname}:-}"
if [ -d "$_pa_new_path" ] && [[ ":$_pa_oldvalue:" != *":$_pa_new_path:"* ]]; then
if [ -n "$_pa_oldvalue" ]; then