diff --git a/config/libc/uClibc.in b/config/libc/uClibc.in
index c6b85762..43457c50 100644
--- a/config/libc/uClibc.in
+++ b/config/libc/uClibc.in
@@ -81,9 +81,15 @@ choice
 # Don't remove next line
 # CT_INSERT_VERSION_BELOW
 
+config LIBC_UCLIBC_NG_V_1_0_21
+    bool
+    prompt "1.0.21"
+    select LIBC_UCLIBC_NG_1_0_15_or_later
+
 config LIBC_UCLIBC_NG_V_1_0_20
     bool
     prompt "1.0.20"
+    depends on OBSOLETE
     select LIBC_UCLIBC_NG_1_0_15_or_later
 
 config LIBC_UCLIBC_V_0_9_33_2
@@ -97,6 +103,7 @@ config LIBC_VERSION
     string
 # Don't remove next line
 # CT_INSERT_VERSION_STRING_BELOW
+    default "1.0.21" if LIBC_UCLIBC_NG_V_1_0_21
     default "1.0.20" if LIBC_UCLIBC_NG_V_1_0_20
     default "0.9.33.2" if LIBC_UCLIBC_V_0_9_33_2