diff --git a/site/common-linux b/site/common-linux
index 8d915d0..17d7a8d 100644
--- a/site/common-linux
+++ b/site/common-linux
@@ -10,3 +10,7 @@ samba_cv_HAVE_IRIX_SPECIFIC_CAPABILITIES=${samba_cv_HAVE_IRIX_SPECIFIC_CAPABILIT
 # coreutils
 fu_cv_sys_stat_statfs2_bsize=${fu_cv_sys_stat_statfs2_bsize=yes}
 
+# popt
+ac_cv_va_copy=${ac_cv_va_copy=yes}
+ac_cv___va_copy=${ac_cv___va_copy=yes}
+