diff --git a/src/storm/models/sparse/Model.cpp b/src/storm/models/sparse/Model.cpp
index 071a45071..bd62c17f5 100644
--- a/src/storm/models/sparse/Model.cpp
+++ b/src/storm/models/sparse/Model.cpp
@@ -424,7 +424,7 @@ namespace storm {
             bool Model<ValueType, RewardModelType>::isSinkState(uint64_t state) const {
                 for (auto const& entry : this->getTransitionMatrix().getRowGroup(state)) {
                     if (entry.getColumn() != state) { return false; }
-                    if (storm::utility::isOne(entry.getValue())) { return false; }
+                    if (!storm::utility::isOne(entry.getValue())) { return false; }
                 }
                 return true;
             }