diff --git a/src/electronics/simulation/matrix.cpp b/src/electronics/simulation/matrix.cpp
index fb1248f..0e9b167 100644
--- a/src/electronics/simulation/matrix.cpp
+++ b/src/electronics/simulation/matrix.cpp
@@ -288,7 +288,7 @@ void Matrix::displayLU()
 Map::Map( const uint size )
 {
 	m_size = size;
-	m_map = new ETMap( m_size );
+	m_map = new ETMap( m_size, std::vector<uint>( m_size ) );
 	reset();
 }