diff --git a/contrib/ci/ubuntu.sh b/contrib/ci/ubuntu.sh
index 7340e242d..a8e8224ea 100755
--- a/contrib/ci/ubuntu.sh
+++ b/contrib/ci/ubuntu.sh
@@ -13,6 +13,8 @@ fi
 
 #evaluate using Ubuntu's buildflags
 #evaluate using Debian/Ubuntu's buildflags
+#disable link time optimization, Ubuntu currently only sets it for GCC
+export DEB_BUILD_MAINT_OPTIONS="optimize=-lto"
 eval "$(dpkg-buildflags --export=sh)"
 #filter out -Bsymbolic-functions
 export LDFLAGS=$(dpkg-buildflags --get LDFLAGS | sed "s/-Wl,-Bsymbolic-functions\s//")