diff --git a/src/devices/wifi/mac-stations.cc b/src/devices/wifi/mac-stations.cc
index 4642d6c9d..68a347228 100644
--- a/src/devices/wifi/mac-stations.cc
+++ b/src/devices/wifi/mac-stations.cc
@@ -160,7 +160,7 @@ WifiMode
 MacStations::GetBasicMode (uint32_t i) const
 {
   NS_ASSERT (i < m_basicModes.size ());
-  return m_basicModes[i-1];
+  return m_basicModes[i];
 }
 MacStations::BasicModesIterator 
 MacStations::BeginBasicModes (void) const