1 files changed, 3 insertions, 1 deletions

diff --git a/.travis/install-gpg.sh b/.travis/install-gpg.sh
index 667f1b83..9cd6f3e4 100755
--- a/.travis/install-gpg.sh
+++ b/.travis/install-gpg.sh
@@ -11,7 +11,9 @@ wget "https://www.gnupg.org/ftp/gcrypt/$package/$package-$version.tar.bz2" -O "/
 cd /tmp
 tar xvfa "/tmp/$package.tar.bz2"
 cd "$package-$version"
-./configure "${configure_opts[@]}"
+# Expand configure_opts only if configure_opts is not undefined
+# (in older versions of Bash, empty array is considered undefined)
+./configure "${configure_opts[@]+"${configure_opts[@]}"}"
 make
 sudo make install
 cd