diff --git a/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-sysinit.sh b/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-sysinit.sh
index 9858404..68adfed 100644
--- a/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-sysinit.sh
+++ b/meta-gbs/recipes-gbs/gbs-sysinit/files/gbs-sysinit.sh
@@ -122,7 +122,7 @@
     return 1
   fi
   # sata_prsnt_n is active low => value "true" means low
-  if [[ ${sata_prsnt_n} == "true" ]]; then
+  if [[ ${sata_prsnt_n} == "b true" ]]; then
     set_gpio_direction 'HDD_PRSNT_N' low
   else
     set_gpio_direction 'HDD_PRSNT_N' high