diff --git a/Modules/Numerics/Optimizersv4/include/itkRegistrationParameterScalesEstimator.hxx b/Modules/Numerics/Optimizersv4/include/itkRegistrationParameterScalesEstimator.hxx
index 0bdb586090f..4ed13dd29e6 100644
--- a/Modules/Numerics/Optimizersv4/include/itkRegistrationParameterScalesEstimator.hxx
+++ b/Modules/Numerics/Optimizersv4/include/itkRegistrationParameterScalesEstimator.hxx
@@ -60,7 +60,7 @@ RegistrationParameterScalesEstimator<TMetric>::EstimateMaximumStepSize() -> Floa
 
   for (SizeValueType d = 0; d < dim; ++d)
   {
-    minSpacing = std::min(minSpacing, spacing[d]);
+    minSpacing = std::min<FloatType>(minSpacing, spacing[d]);
   }
 
   return minSpacing;