diff --git a/poincare/src/expression.cpp b/poincare/src/expression.cpp
index 3a0e65b85..876913d34 100644
--- a/poincare/src/expression.cpp
+++ b/poincare/src/expression.cpp
@@ -133,6 +133,7 @@ bool Expression::IsMatrix(const Expression e, Context & context, bool replaceSym
     || e.type() == ExpressionNode::Type::PredictionInterval
     || e.type() == ExpressionNode::Type::MatrixInverse
     || e.type() == ExpressionNode::Type::MatrixTranspose
+    || e.type() == ExpressionNode::Type::MatrixIdentity
     || ((e.type() == ExpressionNode::Type::Symbol || e.type() == ExpressionNode::Type::Function)
         && replaceSymbols
         && SymbolAbstract::matches(