diff --git a/.cirrus.yml b/.cirrus.yml
index 43b7d26d..3384f9c6 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -2,6 +2,7 @@ env:
   CIRRUS_CLONE_DEPTH: 1
   ARCH: amd64
   BASICS: yes
+  CONFFLAGS_USR: -DKLH10_CTYIO_INT=0
 
 task:
   freebsd_instance:
diff --git a/Makefile b/Makefile
index b4a966f3..84604563 100644
--- a/Makefile
+++ b/Makefile
@@ -229,7 +229,7 @@ $(KLH10):
 	./autogen.sh; \
 	$(MKDIR) tmp; \
 	cd tmp; \
-	export CONFFLAGS_USR=-DKLH10_DEV_DPTM03=0; \
+	export CONFFLAGS_USR="-DKLH10_DEV_DPTM03=0 $$CONFFLAGS_USR"; \
 	../configure --enable-lights --bindir="$(CURDIR)/build/klh10"; \
 	$(MAKE) -C bld-ks-its; \
 	$(MAKE) -C bld-ks-its install