diff --git a/bin/exec-env b/bin/exec-env
index f1ef286..fa48df0 100755
--- a/bin/exec-env
+++ b/bin/exec-env
@@ -2,7 +2,7 @@
 
 set -euo pipefail
 
-if [ -v LD_LIBRARY_PATH ]; then
+if [ -n "${LD_LIBRARY_PATH:-}" ]; then
 	export LD_LIBRARY_PATH="${ASDF_INSTALL_PATH}/bin:${LD_LIBRARY_PATH}/lib"
 else
 	export LD_LIBRARY_PATH="${ASDF_INSTALL_PATH}/lib"