diff --git a/de4dot.code/renamer/DerivedFrom.cs b/de4dot.code/renamer/DerivedFrom.cs
index fefc1b8e..abe4ddc4 100644
--- a/de4dot.code/renamer/DerivedFrom.cs
+++ b/de4dot.code/renamer/DerivedFrom.cs
@@ -40,6 +40,12 @@ namespace de4dot.code.renamer {
 		}
 
 		public bool Check(MTypeDef type) {
+			return Check(type, 0);
+		}
+
+		public bool Check(MTypeDef type, int recurseCount) {
+			if (recurseCount >= 100)
+				return false;
 			if (results.ContainsKey(type))
 				return results[type];
 
@@ -53,7 +59,7 @@ namespace de4dot.code.renamer {
 					val = false;
 			}
 			else
-				val = Check(type.baseType.typeDef);
+				val = Check(type.baseType.typeDef, recurseCount + 1);
 
 			results[type] = val;
 			return val;