diff --git a/test/apps/iodemo/run_io_demo.sh b/test/apps/iodemo/run_io_demo.sh
index ebde7702d65..033a32aacb1 100755
--- a/test/apps/iodemo/run_io_demo.sh
+++ b/test/apps/iodemo/run_io_demo.sh
@@ -586,7 +586,7 @@ make_scripts()
 		cat >>${command_file} <<-EOF
 			set_env_vars() {
 			EOF
-		env | grep -P '^UCX_.*=|^PATH=|^LD_LIBRARY_PATH=' | \
+		env | grep -P '^UCX_.*=|^PATH=|^LD_PRELOAD=|^LD_LIBRARY_PATH=' | \
 			xargs -L 1 echo "     export" >>${command_file}
 		cat >>${command_file} <<-EOF
 			    cd $PWD