diff --git a/servers/physics/body_sw.cpp b/servers/physics/body_sw.cpp
index f43d02df356..bd2523a3ae8 100644
--- a/servers/physics/body_sw.cpp
+++ b/servers/physics/body_sw.cpp
@@ -70,17 +70,19 @@ void BodySW::update_inertias() {
 			// We have to recompute the center of mass.
 			center_of_mass_local.zero();
 
-			for (int i = 0; i < get_shape_count(); i++) {
-				real_t area = get_shape_area(i);
+			if (total_area != 0.0) {
+				for (int i = 0; i < get_shape_count(); i++) {
+					real_t area = get_shape_area(i);
 
-				real_t mass = area * this->mass / total_area;
+					real_t mass = area * this->mass / total_area;
 
-				// NOTE: we assume that the shape origin is also its center of mass.
-				center_of_mass_local += mass * get_shape_transform(i).origin;
+					// NOTE: we assume that the shape origin is also its center of mass.
+					center_of_mass_local += mass * get_shape_transform(i).origin;
+				}
+
+				center_of_mass_local /= mass;
 			}
 
-			center_of_mass_local /= mass;
-
 			// Recompute the inertia tensor.
 			Basis inertia_tensor;
 			inertia_tensor.set_zero();
@@ -92,12 +94,15 @@ void BodySW::update_inertias() {
 					continue;
 				}
 
+				real_t area = get_shape_area(i);
+				if (area == 0.0) {
+					continue;
+				}
+
 				inertia_set = true;
 
 				const ShapeSW *shape = get_shape(i);
 
-				real_t area = get_shape_area(i);
-
 				real_t mass = area * this->mass / total_area;
 
 				Basis shape_inertia_tensor = shape->get_moment_of_inertia(mass).to_diagonal_matrix();