diff --git a/target/early/config.in b/target/early/config.in
index 4cb535c..e275be2 100644
--- a/target/early/config.in
+++ b/target/early/config.in
@@ -22,6 +22,8 @@ SDECFGSET_LIBC='uclibc'
 
 # enable uClibc SUSv4 legacy support because lvm2 needs siginterrupt()
 SDECFGSET_PKG_UCLIBC_SUSV4_LEGACY='1'
+# usleep
+SDECFGSET_PKG_UCLIBC_SUSV3_LEGACY='1'
 
 SDECFGSET_OPT='size'
 SDECFGSET_DISABLE_NLS=1