diff --git a/conf/machine/freedom-u540.conf b/conf/machine/freedom-u540.conf
index 651e4e1..6d01c0d 100644
--- a/conf/machine/freedom-u540.conf
+++ b/conf/machine/freedom-u540.conf
@@ -38,8 +38,6 @@ WIC_CREATE_EXTRA_ARGS ?= "--no-fstab-update"
 
 IMAGE_BOOT_FILES = ""
 
-TCLIBC = "glibc"
-
 ### wic default support
 WKS_FILE_DEPENDS ?= " \
     riscv-pk \