diff --git a/target/early/config.in b/target/early/config.in
index 17d0443..4cb535c 100644
--- a/target/early/config.in
+++ b/target/early/config.in
@@ -20,6 +20,9 @@ SDECFGSET_CROSSBUILD=1
 
 SDECFGSET_LIBC='uclibc'
 
+# enable uClibc SUSv4 legacy support because lvm2 needs siginterrupt()
+SDECFGSET_PKG_UCLIBC_SUSV4_LEGACY='1'
+
 SDECFGSET_OPT='size'
 SDECFGSET_DISABLE_NLS=1