diff --git a/modules/generative_grammar/generator.cpp b/modules/generative_grammar/generator.cpp
index 55a73db3f8..4e5960e66e 100644
--- a/modules/generative_grammar/generator.cpp
+++ b/modules/generative_grammar/generator.cpp
@@ -31,7 +31,7 @@ void Generator::initialise_state() {
 	print_line("Writing path");
 	int y{ (Math::abs((int)Math::rand()) % (this->state->size.y - 6)) + 3 };
 	print_line("Path at y =", y);
-	for (int i{ 1 }; i < this->state->size.x - 1; ++i) {
+	for (int i{ 1 }; i < this->state->size.x - 2; ++i) {
 		this->state->set_at({ i, y }, Terminals::Path);
 	}
 	print_line("Writing start & goal");