diff --git a/poincare/src/symbol.cpp b/poincare/src/symbol.cpp
index 99d0daf23..432160f32 100644
--- a/poincare/src/symbol.cpp
+++ b/poincare/src/symbol.cpp
@@ -68,7 +68,7 @@ int SymbolNode::getVariables(Context & context, isVariableTest isVariable, char
   while(variables[variablesIndex] != 0) {
     variablesIndex+= maxSizeVariable;
   }
-  if (isVariable(m_name)) {
+  if (!isConstant() && isVariable(m_name)) {
     int index = 0;
     while (variables[index] != 0) {
       if (strcmp(m_name, &variables[index]) == 0) {