diff --git a/configs/hifive_unleashed_defconfig b/configs/hifive_unleashed_defconfig
index 35cb3558f9..80c5e48f96 100644
--- a/configs/hifive_unleashed_defconfig
+++ b/configs/hifive_unleashed_defconfig
@@ -2,6 +2,7 @@
 BR2_riscv=y
 BR2_riscv_custom=y
 BR2_RISCV_ISA_CUSTOM_RVM=y
+BR2_RISCV_ISA_CUSTOM_RVA=y
 BR2_RISCV_ISA_CUSTOM_RVF=y
 BR2_RISCV_ISA_CUSTOM_RVD=y
 BR2_RISCV_ISA_CUSTOM_RVC=y