diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 5a744f4791..1a76785498 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -5,6 +5,7 @@ CONFIG_DISTRO_DEFAULTS=y
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_FIT=y
 CONFIG_FIT_SIGNATURE=y
+CONFIG_FIT_ENABLE_RSASSA_PSS_SUPPORT=y
 CONFIG_FIT_VERBOSE=y
 CONFIG_BOOTSTAGE=y
 CONFIG_BOOTSTAGE_REPORT=y