diff --git a/src/wifi/model/wifi-phy.cc b/src/wifi/model/wifi-phy.cc
index b9cb08d95..4d9b8ce4c 100644
--- a/src/wifi/model/wifi-phy.cc
+++ b/src/wifi/model/wifi-phy.cc
@@ -260,7 +260,7 @@ WifiPhy::GetPlcpHeaderDurationMicroSeconds (WifiMode payloadMode, WifiPreamble p
             }
       }
     case WIFI_MOD_CLASS_ERP_OFDM:
-      return 16;
+      return 4;
 
     case WIFI_MOD_CLASS_DSSS:
       if (preamble == WIFI_PREAMBLE_SHORT)
@@ -309,7 +309,7 @@ WifiPhy::GetPlcpPreambleDurationMicroSeconds (WifiMode payloadMode, WifiPreamble
            return 16;
       }
     case WIFI_MOD_CLASS_ERP_OFDM:
-      return 4;
+      return 16;
 
     case WIFI_MOD_CLASS_DSSS:
       if (preamble == WIFI_PREAMBLE_SHORT)