diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index d51e4a4e1..29674930d 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -9537,6 +9537,8 @@ void Command_Platinums(void)
 
 		tic_t platinumtime = UINT32_MAX;
 
+		std::unordered_map<std::string, int> names;
+
 		for (auto &stafftime : stafftimes)
 		{
 			if (stafftime == stafftimes[0])
@@ -9550,6 +9552,12 @@ void Command_Platinums(void)
 				CONS_Printf(", %s (+%d:%02d)", stafftime.second.c_str(),
 					G_TicsToSeconds(stafftime.first - platinumtime), G_TicsToCentiseconds(stafftime.first - platinumtime));
 			}
+
+			names[stafftime.second]++;
+			if (names[stafftime.second] > 1)
+			{
+				CONS_Printf(" (DUPLICATE)");
+			}
 		}
 
 		CONS_Printf("\n");