diff --git a/modules/terrain_editor/terrain_primitive.cpp b/modules/terrain_editor/terrain_primitive.cpp
index 757d9e77..d5a0a548 100644
--- a/modules/terrain_editor/terrain_primitive.cpp
+++ b/modules/terrain_editor/terrain_primitive.cpp
@@ -117,6 +117,9 @@ void NoisePrimitive::_bind_methods() {
 
 void NoisePrimitive::evaluate(Vector2 at, float &io_height) const {
 	if (this->noise.is_valid()) {
+		if (Math::is_nan(io_height) || Math::is_inf(io_height)) {
+			io_height = 0;
+		}
 		float noise_sample{ this->noise->get_noise_2dv(at / this->noise_scale) };
 		noise_sample *= this->noise_amplitude;
 		io_height = blend(io_height, io_height + noise_sample);