diff --git a/configs/xtensa-dc233c_zephyr-elf.config b/configs/xtensa-dc233c_zephyr-elf.config
index 27261724..3763307c 100644
--- a/configs/xtensa-dc233c_zephyr-elf.config
+++ b/configs/xtensa-dc233c_zephyr-elf.config
@@ -6,3 +6,4 @@ CT_ARCH_XTENSA=y
 CT_XTENSA_CUSTOM=y
 CT_TARGET_VENDOR="dc233c_zephyr"
 CT_TARGET_CFLAGS="-ftls-model=local-exec"
+CT_MULTILIB=y
diff --git a/configs/xtensa-sample_controller_zephyr-elf.config b/configs/xtensa-sample_controller_zephyr-elf.config
index b3af0b2d..a95b21eb 100644
--- a/configs/xtensa-sample_controller_zephyr-elf.config
+++ b/configs/xtensa-sample_controller_zephyr-elf.config
@@ -7,3 +7,4 @@ CT_XTENSA_CUSTOM=y
 CT_TARGET_VENDOR="sample_controller_zephyr"
 CT_TARGET_CFLAGS="-ftls-model=local-exec"
 CT_CC_GCC_CONFIG_TLS=n
+CT_MULTILIB=y