diff --git a/src/server/game/Achievements/AchievementMgr.cpp b/src/server/game/Achievements/AchievementMgr.cpp
index 31bb2e63cbd..a861e88c18f 100644
--- a/src/server/game/Achievements/AchievementMgr.cpp
+++ b/src/server/game/Achievements/AchievementMgr.cpp
@@ -1846,7 +1846,7 @@ template<>
 void AchievementMgr<Player>::CompletedAchievement(AchievementEntry const* achievement, Player* referencePlayer)
 {
     sLog->outInfo(LOG_FILTER_ACHIEVEMENTSYS, "AchievementMgr::CompletedAchievement(%u). Player: %s (%u)",
-        achievement->ID, m_player->GetName().c_str(), m_player->GetGUIDLow());
+        achievement->ID, GetOwner()->GetName().c_str(), GetOwner()->GetGUIDLow());
 
     // disable for gamemasters with GM-mode enabled
     if (GetOwner()->isGameMaster())