diff --git a/src/storm-parsers/parser/FormulaParserGrammar.cpp b/src/storm-parsers/parser/FormulaParserGrammar.cpp
index 72a8721af..3a45a9682 100644
--- a/src/storm-parsers/parser/FormulaParserGrammar.cpp
+++ b/src/storm-parsers/parser/FormulaParserGrammar.cpp
@@ -329,11 +329,11 @@ namespace storm {
                 std::vector<boost::optional<storm::logic::TimeBound>> lowerBounds, upperBounds;
                 std::vector<storm::logic::TimeBoundReference> timeBoundReferences;
                 for (auto const& timeBound : timeBounds.get()) {
+                    STORM_LOG_ASSERT(!std::get<0>(timeBound), "Lower bounds are not implemented for globally formulas.");
                     lowerBounds.push_back(std::get<0>(timeBound));
                     upperBounds.push_back(std::get<1>(timeBound));
                     timeBoundReferences.emplace_back(*std::get<2>(timeBound));
                 }
-                STORM_LOG_ASSERT(lowerBounds.size() == 0, "Lower bounds are not implemented for globally formulas.");
                 return std::shared_ptr<storm::logic::Formula const>(new storm::logic::BoundedGloballyFormula(subformula, lowerBounds, upperBounds, timeBoundReferences));
             } else {
                 return std::shared_ptr<storm::logic::Formula const>(new storm::logic::GloballyFormula(subformula));