diff --git a/runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java b/runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java
index 0a821d9a7b..7e66bb0fdc 100644
--- a/runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java
+++ b/runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java
@@ -485,7 +485,7 @@ public class ConfigManager
 
 	public void setConfiguration(String groupName, String profile, String key, @NonNull String value)
 	{
-		if (Strings.isNullOrEmpty(groupName) || Strings.isNullOrEmpty(key))
+		if (Strings.isNullOrEmpty(groupName) || Strings.isNullOrEmpty(key) || key.indexOf(':') != -1)
 		{
 			throw new IllegalArgumentException();
 		}