diff --git a/sources/uClibc.config b/sources/uClibc.config
index d2053e22dd..e3ff73cb2c 100644
--- a/sources/uClibc.config
+++ b/sources/uClibc.config
@@ -72,6 +72,8 @@ UCLIBC_HAS_FULL_RPC=y
 #
 # String and Stdio Support
 #
+UCLIBC_HAS_STRING_GENERIC_OPT=y
+UCLIBC_HAS_STRING_ARCH_OPT=y
 UCLIBC_HAS_CTYPE_TABLES=y
 UCLIBC_HAS_CTYPE_SIGNED=y
 # UCLIBC_HAS_CTYPE_UNSAFE is not set