diff --git a/Common/ImageSamplers/itkImageGridSampler.hxx b/Common/ImageSamplers/itkImageGridSampler.hxx
index dc5b2bc44..eef84e489 100644
--- a/Common/ImageSamplers/itkImageGridSampler.hxx
+++ b/Common/ImageSamplers/itkImageGridSampler.hxx
@@ -246,19 +246,19 @@ ImageGridSampler<TInputImage>::SetNumberOfSamples(unsigned long nrofsamples)
 
   /** Compute the grid spacing. */
   const double indimd = static_cast<double>(InputImageDimension);
-  int          gridspacing = static_cast<int>( // no unsigned int version of rnd, max
+  int          gridSpacing = static_cast<int>( // no unsigned int version of rnd, max
     Math::Round<double>(std::pow(fraction, 1.0 / indimd)));
-  gridspacing = std::max(1, gridspacing);
+  gridSpacing = std::max(1, gridSpacing);
 
-  /** Set gridspacings for all dimensions
+  /** Set gridSpacings for all dimensions
    * Do not use the SetSampleGridSpacing function because it calls
    * SetNumberOfSamples(0) internally.
    */
-  SampleGridSpacingType gridspacings;
-  gridspacings.Fill(gridspacing);
-  if (m_SampleGridSpacing != gridspacings)
+  SampleGridSpacingType gridSpacings;
+  gridSpacings.Fill(gridSpacing);
+  if (m_SampleGridSpacing != gridSpacings)
   {
-    m_SampleGridSpacing = gridspacings;
+    m_SampleGridSpacing = gridSpacings;
     this->Modified();
   }
 
diff --git a/Components/ImageSamplers/Grid/elxGridSampler.hxx b/Components/ImageSamplers/Grid/elxGridSampler.hxx
index 7fbccda50..bf3d4d250 100644
--- a/Components/ImageSamplers/Grid/elxGridSampler.hxx
+++ b/Components/ImageSamplers/Grid/elxGridSampler.hxx
@@ -37,7 +37,7 @@ GridSampler<TElastix>::BeforeEachResolution()
 
   const unsigned int level = this->m_Registration->GetAsITKBaseType()->GetCurrentLevel();
 
-  GridSpacingType gridspacing;
+  GridSpacingType gridSpacing;
 
   /** Read the desired grid spacing of the samples. */
   unsigned int spacing_dim;
@@ -46,9 +46,9 @@ GridSampler<TElastix>::BeforeEachResolution()
     spacing_dim = 2;
     configuration.ReadParameter(
       spacing_dim, "SampleGridSpacing", this->GetComponentLabel(), level * InputImageDimension + dim, -1);
-    gridspacing[dim] = static_cast<SampleGridSpacingValueType>(spacing_dim);
+    gridSpacing[dim] = static_cast<SampleGridSpacingValueType>(spacing_dim);
   }
-  this->SetSampleGridSpacing(gridspacing);
+  this->SetSampleGridSpacing(gridSpacing);
 
 } // end BeforeEachResolution()