diff --git a/poincare/src/preferences.cpp b/poincare/src/preferences.cpp
index 467f0065c..207dea71d 100644
--- a/poincare/src/preferences.cpp
+++ b/poincare/src/preferences.cpp
@@ -7,7 +7,7 @@ Preferences::Preferences() :
   m_angleUnit(AngleUnit::Degree),
   m_displayMode(Preferences::PrintFloatMode::Decimal),
   m_editionMode(EditionMode::Edition2D),
-  m_complexFormat(Preferences::ComplexFormat::Cartesian),
+  m_complexFormat(Preferences::ComplexFormat::Real),
   m_numberOfSignificantDigits(PrintFloat::k_numberOfPrintedSignificantDigits)
 {
 }