diff --git a/src/de/dhbwstuttgart/bytecode/signature/Signature.java b/src/de/dhbwstuttgart/bytecode/signature/Signature.java
index 6f387f17..39668648 100644
--- a/src/de/dhbwstuttgart/bytecode/signature/Signature.java
+++ b/src/de/dhbwstuttgart/bytecode/signature/Signature.java
@@ -432,6 +432,9 @@ public class Signature {
 			
 			while(subAndSuperTph.containsKey(superTph)) {
 				superTph = subAndSuperTph.get(superTph);
+				if(tphsInRel.containsValue(superTph)) {
+					break;
+				}
 				tphsInRel.put(tphsInRel.size(), superTph);
 				numOfVisitedPairs++;
 			}