diff --git a/poincare/src/arc_cosine.cpp b/poincare/src/arc_cosine.cpp
index d150f306e..8ed9234d8 100644
--- a/poincare/src/arc_cosine.cpp
+++ b/poincare/src/arc_cosine.cpp
@@ -36,9 +36,11 @@ Complex<T> ArcCosineNode::computeOnComplex(const std::complex<T> c, Preferences:
 }
 
 Expression ArcCosine::shallowReduce(Context & context, Preferences::AngleUnit angleUnit) {
-  Expression e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e.isUndefinedOrAllocationFailure()) {
-    return e;
+  {
+    Expression e = Expression::defaultShallowReduce(context, angleUnit);
+    if (e.isUndefinedOrAllocationFailure()) {
+      return e;
+    }
   }
 #if MATRIX_EXACT_REDUCING
   if (childAtIndex(0).type() == Type::Matrix) {
diff --git a/poincare/src/arc_sine.cpp b/poincare/src/arc_sine.cpp
index cc07956d8..fee872a3d 100644
--- a/poincare/src/arc_sine.cpp
+++ b/poincare/src/arc_sine.cpp
@@ -36,9 +36,11 @@ Complex<T> ArcSineNode::computeOnComplex(const std::complex<T> c, Preferences::A
 }
 
 Expression ArcSine::shallowReduce(Context & context, Preferences::AngleUnit angleUnit) {
-  Expression e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e.isUndefinedOrAllocationFailure()) {
-    return e;
+  {
+    Expression e = Expression::defaultShallowReduce(context, angleUnit);
+    if (e.isUndefinedOrAllocationFailure()) {
+      return e;
+    }
   }
 #if MATRIX_EXACT_REDUCING
   if (childAtIndex(0).type() == Type::Matrix) {
diff --git a/poincare/src/arc_tangent.cpp b/poincare/src/arc_tangent.cpp
index 1252f346a..6fc0c885b 100644
--- a/poincare/src/arc_tangent.cpp
+++ b/poincare/src/arc_tangent.cpp
@@ -36,9 +36,11 @@ Expression ArcTangentNode::shallowReduce(Context & context, Preferences::AngleUn
 }
 
 Expression ArcTangent::shallowReduce(Context & context, Preferences::AngleUnit angleUnit) {
-  Expression e = Expression::defaultShallowReduce(context, angleUnit);
-  if (e.isUndefinedOrAllocationFailure()) {
-    return e;
+  {
+    Expression e = Expression::defaultShallowReduce(context, angleUnit);
+    if (e.isUndefinedOrAllocationFailure()) {
+      return e;
+    }
   }
 #if MATRIX_EXACT_REDUCING
   if (childAtIndex(0).type() == ExpressionNode::Type::Matrix) {