diff --git a/app-proto/src/assembly.rs b/app-proto/src/assembly.rs
index 161859d..055b9a2 100644
--- a/app-proto/src/assembly.rs
+++ b/app-proto/src/assembly.rs
@@ -422,16 +422,16 @@ impl Assembly {
         
         // set up the constraint problem
         let problem = self.elements.with_untracked(|elts| {
-            let mut problem_to_be = ConstraintProblem::new(elts.len());
+            let mut problem = ConstraintProblem::new(elts.len());
             for (_, elt) in elts {
-                elt.pose(&mut problem_to_be, elts);
+                elt.pose(&mut problem, elts);
             }
             self.regulators.with_untracked(|regs| {
                 for (_, reg) in regs {
-                    reg.pose(&mut problem_to_be, elts);
+                    reg.pose(&mut problem, elts);
                 }
             });
-            problem_to_be
+            problem
         });
         
         /* DEBUG */