diff --git a/debian/rules b/debian/rules
index 78ec0a2..34f94ab 100755
--- a/debian/rules
+++ b/debian/rules
@@ -2,6 +2,7 @@
 
 export QT_SELECT=5
 export DEB_BUILD_MAINT_OPTIONS=hardening=+all
+export DEB_CFLAGS_MAINT_STRIP=-Werror=implicit-function-declaration
 
 %:
 	dh $@