diff --git a/poincare/src/function.cpp b/poincare/src/function.cpp
index d8ee6add4..706bad731 100644
--- a/poincare/src/function.cpp
+++ b/poincare/src/function.cpp
@@ -125,7 +125,7 @@ Expression Function::shallowReduce(ExpressionNode::ReductionContext reductionCon
 }
 
 Expression Function::deepReplaceReplaceableSymbols(Context * context, bool * didReplace) {
-  Expression e = context->expressionForSymbolAbstract(*this, true);
+  Expression e = context->expressionForSymbolAbstract(*this, false);
   if (e.isUninitialized()) {
     return *this;
   }
diff --git a/poincare/src/symbol_abstract.cpp b/poincare/src/symbol_abstract.cpp
index a6754aeec..41c2bfc6b 100644
--- a/poincare/src/symbol_abstract.cpp
+++ b/poincare/src/symbol_abstract.cpp
@@ -57,10 +57,7 @@ bool SymbolAbstract::matches(const SymbolAbstract & symbol, ExpressionTest test,
 }
 
 Expression SymbolAbstract::Expand(const SymbolAbstract & symbol, Context * context, bool clone) {
-  bool isFunction = symbol.type() == ExpressionNode::Type::Function;
-  /* Always clone the expression for Function because we are going to alter e
-   * by replacing all UnknownX in it. */
-  Expression e = context->expressionForSymbolAbstract(symbol, clone || isFunction);
+  Expression e = context->expressionForSymbolAbstract(symbol, clone);
   /* Replace all the symbols iteratively. This prevents a memory failure when
    * symbols are defined circularly. */
   e = Expression::ExpressionWithoutSymbols(e, context);