diff --git a/poincare/include/poincare/power.h b/poincare/include/poincare/power.h
index 1c972497b..eab93f84a 100644
--- a/poincare/include/poincare/power.h
+++ b/poincare/include/poincare/power.h
@@ -14,6 +14,7 @@ class Power : public StaticHierarchy<2> {
   friend class NthRoot;
   friend class SquareRoot;
   friend class Addition;
+  friend class Division;
 public:
   Type type() const override;
   Expression * clone() const override;
diff --git a/poincare/src/division.cpp b/poincare/src/division.cpp
index 8d03c7509..2badf3742 100644
--- a/poincare/src/division.cpp
+++ b/poincare/src/division.cpp
@@ -31,7 +31,7 @@ Expression * Division::shallowReduce(Context& context, AngleUnit angleUnit) {
   Power * p = new Power(operand(1), new Rational(-1), false);
   Multiplication * m = new Multiplication(operand(0), p, false);
   detachOperands();
-  p->deepReduce(context, angleUnit);
+  p->shallowReduce(context, angleUnit);
   replaceWith(m, true);
   return m->shallowReduce(context, angleUnit);
 }