diff --git a/include/site/cris-linux-uclibc b/include/site/cris-linux-uclibc
index e8097fab31..bc2835ac19 100644
--- a/include/site/cris-linux-uclibc
+++ b/include/site/cris-linux-uclibc
@@ -3,3 +3,4 @@
 . $TOPDIR/include/site/linux-uclibc
 
 ac_cv_linux_vers=2.6.19.4
+ac_cv_sizeof_size_t=4