diff --git a/debian/rules b/debian/rules
index ade7f12..2aa286b 100755
--- a/debian/rules
+++ b/debian/rules
@@ -1,6 +1,9 @@
 #!/usr/bin/make -f
 
 export DEB_BUILD_MAINT_OPTIONS = hardening=+all
+
+# override value set in src/c_make.gen leading to #984367
+export CXXDEFS =
 
 %:
 	dh $@