diff --git a/src/CSGTermEvaluator.cc b/src/CSGTermEvaluator.cc
index 6416f29..b3753cf 100644
--- a/src/CSGTermEvaluator.cc
+++ b/src/CSGTermEvaluator.cc
@@ -109,7 +109,7 @@ static shared_ptr<CSGTerm> evaluate_csg_term_from_geometry(const State &state,
 			shared_ptr<const PolySet> ps = dynamic_pointer_cast<const PolySet>(geom);
 			// Since is_convex() doesn't handle non-planar faces, we need to tessellate
 			// also in the indeterminate state so we cannot just use a boolean comparison. See #1061
-			bool convex = ps->convexValue();
+			bool convex{ps->convexValue()};
 			if (ps && !convex) {
 				assert(ps->getDimension() == 3);
 				PolySet *ps_tri = new PolySet(3, ps->convexValue());