diff --git a/TShockAPI/Group.cs b/TShockAPI/Group.cs
index b3375ab5..fb4b6a5c 100644
--- a/TShockAPI/Group.cs
+++ b/TShockAPI/Group.cs
@@ -50,6 +50,16 @@ namespace TShockAPI
             }
             return false;
         }
+
+        public void NegatePermission(string permission)
+        {
+            negatedPermissions.Add(permission);
+        }
+
+        public void AddPermission(string permission)
+        {
+            permissions.Add(permission);
+        }
     }
 
     public class SuperAdminGroup : Group
diff --git a/TShockAPI/TShockAPI.csproj b/TShockAPI/TShockAPI.csproj
index 3eede161..d2813301 100644
--- a/TShockAPI/TShockAPI.csproj
+++ b/TShockAPI/TShockAPI.csproj
@@ -60,7 +60,6 @@
     <Compile Include="FileTools.cs" />
     <Compile Include="Group.cs" />
     <Compile Include="Log.cs" />
-    <Compile Include="Permission.cs" />
     <Compile Include="Tools.cs" />
     <Compile Include="TShock.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/TShockAPI/Tools.cs b/TShockAPI/Tools.cs
index 064567f8..9c79e0ec 100644
--- a/TShockAPI/Tools.cs
+++ b/TShockAPI/Tools.cs
@@ -338,11 +338,10 @@ namespace TShockAPI
                 string[] args = lines[i].Split(' ');
                 string name = args[0];
                 string parent = args[1];
-                Group group;
+                Group group = null;
                 if (parent.Equals("null"))
                 {
                     group = new Group(name);
-                    groups.Add(group);
                 }
                 else
                 {
@@ -355,6 +354,25 @@ namespace TShockAPI
                         }
                     }
                 }
+                if (group == null)
+                {
+                    throw new System.Exception("Something in the groups.txt is fucked up");
+                }
+                else
+                {
+                    for (int j = 2; j < args.Length; j++)
+                    {
+                        string permission = args[j];
+                        if (permission.StartsWith("!"))
+                        {
+                            group.NegatePermission(args[j].Replace("!", ""));
+                        }
+                        else
+                        {
+                            group.AddPermission(args[j]);
+                        }
+                    }
+                }
             }
         }