diff --git a/flex/bin/load_plan_and_gen.sh b/flex/bin/load_plan_and_gen.sh
index 82afed3aaeaf..a41e6a805946 100755
--- a/flex/bin/load_plan_and_gen.sh
+++ b/flex/bin/load_plan_and_gen.sh
@@ -536,7 +536,7 @@ run() {
     echo "Engine type is hqps, generating dynamic library for hqps engine."
     # if PROCEDURE_DESCRIPTION is not set, use empty string
     if [ ! -z ${PROCEDURE_DESCRIPTION} ]; then
-      PROCEDURE_DESCRIPTION=\"${PROCEDURE_DESCRIPTION}\"
+      PROCEDURE_DESCRIPTION="\"${PROCEDURE_DESCRIPTION}\""
     fi
     compile_hqps_so ${INPUT} ${WORK_DIR} ${IR_CONF} ${GRAPH_SCHEMA_PATH} ${GIE_HOME} ${OUTPUT_DIR} ${PROCEDURE_NAME} ${PROCEDURE_DESCRIPTION}