diff --git a/CHANGELOG.md b/CHANGELOG.md
index bf3dfed3..f03c092d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ This is the rolling changelog for TShock for Terraria. Use past tense when addin
 * Fixed `TSPlayer.GiveItem` not working if the player is in lava. (@gohjoseph)
 * Only allow using Teleportation Potions, Magic Conch, and Demon Conch whilst holding them. (@drunderscore)
 * Updated server startup language to be more clear when encountering a fatal startup error. Now, the server gives more context as to what happened so that there's a better chance of people being able to help themselves. (@hakusaro)
+* Added `-worldevil <type>` command line argument (@NotGeri)
 
 ## TShock 4.5.17
 * Fixed duplicate characters (twins) after repeatedly logging in as the same character due to connection not being immediately closed during `NetHooks_NameCollision`. (@gohjoseph)
diff --git a/TShockAPI/TShock.cs b/TShockAPI/TShock.cs
index 2c604513..6bfd8006 100644
--- a/TShockAPI/TShock.cs
+++ b/TShockAPI/TShock.cs
@@ -768,6 +768,28 @@ namespace TShockAPI
 						}
 					})
 
+				.AddFlag("-worldevil", (value) =>
+				{
+
+					int worldEvil;
+					switch (value.ToLower())
+					{
+						case "random":
+							worldEvil = -1;
+							break;
+						case "corrupt":
+							worldEvil = 0;
+							break;
+						case "crimson":
+							worldEvil = 1;
+							break;
+						default:
+							throw new InvalidOperationException("Invalid value given for command line argument \"-worldevil\".");
+					}
+
+					ServerApi.LogWriter.PluginWriteLine(this, String.Format("New worlds will be generated with the {0} world evil type!", value), TraceLevel.Verbose);
+					WorldGen.WorldGenParam_Evil = worldEvil;
+				})
 
 				//Flags without arguments
 				.AddFlag("-logclear", () => LogClear = true)