diff --git a/include/site/linux-uclibc b/include/site/linux-uclibc
index 061f345b13..2d34210066 100644
--- a/include/site/linux-uclibc
+++ b/include/site/linux-uclibc
@@ -43,7 +43,7 @@ ac_cv_have_openpty_ctty_bug=yes
 ac_cv_have_space_d_name_in_struct_dirent=yes
 ac_cv_header_netinet_sctp_h=no
 ac_cv_header_netinet_sctp_uio_h=no
-ac_cv_int64_t=no
+ac_cv_int64_t=yes
 ac_cv_lbl_unaligned_fail=no
 ac_cv_linux_kernel_pppoe=yes
 ac_cv_linux_vers=2
@@ -55,6 +55,7 @@ ac_cv_time_r_type=POSIX
 ac_cv_type_suseconds_t=yes
 ac_cv_uchar=no
 ac_cv_uint=yes
+ac_cv_uint64_t=yes
 ac_cv_ulong=yes
 ac_cv_ushort=yes
 ac_cv_va_copy=no