diff --git a/src/storm/storage/dd/cudd/InternalCuddAdd.cpp b/src/storm/storage/dd/cudd/InternalCuddAdd.cpp
index d94e6cadc..fe9a85f7e 100644
--- a/src/storm/storage/dd/cudd/InternalCuddAdd.cpp
+++ b/src/storm/storage/dd/cudd/InternalCuddAdd.cpp
@@ -596,6 +596,8 @@ namespace storm {
                 splitIntoGroupsRec(dd, groups, ddGroupVariableIndices, currentLevel + 1, maxLevel);
                 splitIntoGroupsRec(dd, groups, ddGroupVariableIndices, currentLevel + 1, maxLevel);
             } else {
+                // FIXME: We first traverse the else successor (unlike other variants of this method).
+                // Otherwise, the GameBasedMdpModelCheckerTest would not terminate. See github issue #64
                 splitIntoGroupsRec(Cudd_E(dd), groups, ddGroupVariableIndices, currentLevel + 1, maxLevel);
                 splitIntoGroupsRec(Cudd_T(dd), groups, ddGroupVariableIndices, currentLevel + 1, maxLevel);
             }
diff --git a/src/storm/storage/dd/sylvan/InternalSylvanAdd.cpp b/src/storm/storage/dd/sylvan/InternalSylvanAdd.cpp
index 8ede93854..d50b8cc0f 100644
--- a/src/storm/storage/dd/sylvan/InternalSylvanAdd.cpp
+++ b/src/storm/storage/dd/sylvan/InternalSylvanAdd.cpp
@@ -1007,6 +1007,8 @@ namespace storm {
                 bool elseComplemented = mtbdd_hascomp(elseDdNode) ^ negated;
                 bool thenComplemented = mtbdd_hascomp(thenDdNode) ^ negated;
                 
+                // FIXME: We first traverse the else successor (unlike other variants of this method).
+                // Otherwise, the GameBasedMdpModelCheckerTest would not terminate. See github issue #64
                 splitIntoGroupsRec(mtbdd_regular(elseDdNode), elseComplemented, groups, ddGroupVariableIndices, currentLevel + 1, maxLevel);
                 splitIntoGroupsRec(mtbdd_regular(thenDdNode), thenComplemented, groups, ddGroupVariableIndices, currentLevel + 1, maxLevel);
             }