diff --git a/GUI/Model/Device/BeamWavelengthItem.cpp b/GUI/Model/Device/BeamWavelengthItem.cpp
index 8aba2eb5236731a487d55692a629ea8586cdf868..3d69271bd15e845aa806bef20ae2284e85384e28 100644
--- a/GUI/Model/Device/BeamWavelengthItem.cpp
+++ b/GUI/Model/Device/BeamWavelengthItem.cpp
@@ -31,6 +31,7 @@ void initDistribution(DistributionItem* newDistribution,
     if (auto* nd = dynamic_cast<SymmetricResolutionItem*>(newDistribution)) {
         nd->setMean(meanVal);
         nd->setMeanDecimals(4);
+        nd->mean().setLimits(RealLimits::lowerLimited(std::numeric_limits<double>::min()));
     }
 
     newDistribution->initDistribution(meanVal);