diff --git a/srcpkgs/libcdr/template b/srcpkgs/libcdr/template
index fd6e3cf6e6..26dd576745 100644
--- a/srcpkgs/libcdr/template
+++ b/srcpkgs/libcdr/template
@@ -19,6 +19,8 @@ post_configure() {
 	for _f in $(find ${wrksrc} -name Makefile); do
 		sed -i $_f -e "s; -O0;;"
 	done
+	# Fix for gcc7 -Werror=implicit-fallthrough=
+	sed -i src/lib/CMXParser.cpp -e's;Fallthrough ;Fallthrough- ;'
 }
 
 libcdr-devel_package() {