diff --git a/ChangeLog b/ChangeLog
index 74222b7..f2164a9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -16,6 +16,11 @@
 ################################################################################  
 ################################################################################
 
+240430 Martin Raden
+ * IntaRNA/PredictorMfeEns :
+   * updateZ()
+     * BUGFIX : no handling of partial Z including ED values (so far not used)
+
 240429 Martin Raden
  * IntaRNA/Interaction
    * Seed::operator"<"
@@ -28,9 +33,6 @@
  * IntaRNA/SeedHandler :
    * addSeeds()
      * BUGFIX : if internal seed base pairs were not found seed was still added
- * IntaRNA/PredictorMfeEns :
-   * updateZ()
-     * BUGFIX : no handling of partial Z including ED values (so far not used)
 
 ################################################################################
 ### version 3.4.0
diff --git a/src/IntaRNA/PredictorMfeEns2dSeedExtension.cpp b/src/IntaRNA/PredictorMfeEns2dSeedExtension.cpp
index 4b19565..250339a 100644
--- a/src/IntaRNA/PredictorMfeEns2dSeedExtension.cpp
+++ b/src/IntaRNA/PredictorMfeEns2dSeedExtension.cpp
@@ -102,13 +102,13 @@ predict( const IndexRange & r1, const IndexRange & r2 )
 			for (size_t l2 = 0; l2< hybridZ_left.size2(); l2++) {
 				// check complementarity of boundary
 				if ( Z_equal(hybridZ_left(l1,l2), 0.0) ) continue;
-				// ensure max interaction length in seq 1
+				// iterate extension right of seed in seq 1
 				for (size_t r1 = 0; r1 < hybridZ_right.size1() ; r1++) {
-					// check interaction length
+					// ensure max interaction length in seq 1
 					if (sj1+r1-si1+l1 >= energy.getAccessibility1().getMaxLength()) break;
-					// ensure max interaction length in seq 2
+					// iterate extension right of seed in seq 2
 					for (size_t r2 = 0; r2 < hybridZ_right.size2() ; r2++) {
-						// check interaction length
+						// ensure max interaction length in seq 2
 						if (sj2+r2-si2+l2 >= energy.getAccessibility2().getMaxLength()) break;
 						// check complementarity of boundary
 						if (Z_equal(hybridZ_right(r1,r2),0.0)) continue;