diff --git a/Gems/Terrain/Code/Source/TerrainSystem/TerrainSystem.h b/Gems/Terrain/Code/Source/TerrainSystem/TerrainSystem.h
index 2296d48843..3e489730d0 100644
--- a/Gems/Terrain/Code/Source/TerrainSystem/TerrainSystem.h
+++ b/Gems/Terrain/Code/Source/TerrainSystem/TerrainSystem.h
@@ -163,7 +163,8 @@ namespace Terrain
             AzFramework::Terrain::SurfacePointListFillCallback perPositionCallback,
             Sampler sampleFilter = Sampler::DEFAULT) const override;
 
-        //! Returns the number of samples for a given region and step size.
+        //! Returns the number of samples for a given region and step size. The first and second
+        //! elements of the pair correspond to the X and Y sample counts respectively.
         virtual AZStd::pair<size_t, size_t> GetNumSamplesFromRegion(const AZ::Aabb& inRegion,
             const AZ::Vector2& stepSize) const override;