diff --git a/base/glibc/glibc.conf b/base/glibc/glibc.conf
index a282223e1..8006c3750 100644
--- a/base/glibc/glibc.conf
+++ b/base/glibc/glibc.conf
@@ -111,7 +111,7 @@ var_insert GCC_WRAPPER_INSERT " " "-O"
 # glibc does not like -ffast-math
 var_insert GCC_WRAPPER_REMOVE " " "-ffast-math"
 
-var_append confopt " " "--enable-kernel=2.6.18"
+var_append extraconfopt " " "--enable-kernel=2.6.18"
 
 # Disable glibc internal debuging but build debuging and profile
 # code so we can use this glibc to debug other programs.