diff --git a/src/appleseed/renderer/kernel/rendering/final/adaptivepixelrenderer.cpp b/src/appleseed/renderer/kernel/rendering/final/adaptivepixelrenderer.cpp
index 3b2a03921c..1890a3c9f2 100644
--- a/src/appleseed/renderer/kernel/rendering/final/adaptivepixelrenderer.cpp
+++ b/src/appleseed/renderer/kernel/rendering/final/adaptivepixelrenderer.cpp
@@ -90,7 +90,7 @@ namespace
           , m_params(params)
           , m_sample_renderer(factory->create(thread_index))
         {
-            if (is_diagnostics_enabled())
+            if (are_diagnostics_enabled())
             {
                 m_variation_aov_index = frame.create_extra_aov_image("variation");
                 m_samples_aov_index = frame.create_extra_aov_image("samples");
@@ -117,7 +117,7 @@ namespace
                 m_params.m_min_samples,
                 m_params.m_max_samples,
                 m_params.m_max_variation,
-                is_diagnostics_enabled() ? "on" : "off");
+                are_diagnostics_enabled() ? "on" : "off");
         }
 
         void release() override
@@ -142,7 +142,7 @@ namespace
                     frame.aov_images().size(),
                     frame.get_filter()));
 
-            if (is_diagnostics_enabled())
+            if (are_diagnostics_enabled())
             {
                 m_diagnostics.reset(new Tile(
                     tile.get_width(), tile.get_height(), 2, PixelFormatFloat));
@@ -156,7 +156,7 @@ namespace
         {
             PixelRendererBase::on_tile_end(frame, tile, aov_tiles);
 
-            if (is_diagnostics_enabled())
+            if (are_diagnostics_enabled())
             {
                 const size_t width = tile.get_width();
                 const size_t height = tile.get_height();
@@ -293,7 +293,7 @@ namespace
             }
 
             // Store diagnostics values in the diagnostics tile.
-            if (is_diagnostics_enabled() && tile_bbox.contains(pt))
+            if (are_diagnostics_enabled() && tile_bbox.contains(pt))
             {
                 Color<float, 2> values;
 
diff --git a/src/appleseed/renderer/kernel/rendering/final/uniformpixelrenderer.cpp b/src/appleseed/renderer/kernel/rendering/final/uniformpixelrenderer.cpp
index 4cefc2b9e3..9a17619d06 100644
--- a/src/appleseed/renderer/kernel/rendering/final/uniformpixelrenderer.cpp
+++ b/src/appleseed/renderer/kernel/rendering/final/uniformpixelrenderer.cpp
@@ -115,7 +115,7 @@ namespace
                 m_params.m_samples,
                 m_params.m_force_aa ? "on" : "off",
                 m_params.m_decorrelate ? "on" : "off",
-                is_diagnostics_enabled() ? "on" : "off");
+                are_diagnostics_enabled() ? "on" : "off");
         }
 
         void release() override
diff --git a/src/appleseed/renderer/kernel/rendering/pixelrendererbase.cpp b/src/appleseed/renderer/kernel/rendering/pixelrendererbase.cpp
index 0186d2f498..333b3b74e2 100644
--- a/src/appleseed/renderer/kernel/rendering/pixelrendererbase.cpp
+++ b/src/appleseed/renderer/kernel/rendering/pixelrendererbase.cpp
@@ -75,7 +75,7 @@ PixelRendererBase::PixelRendererBase(
     }
 }
 
-bool PixelRendererBase::is_diagnostics_enabled() const
+bool PixelRendererBase::are_diagnostics_enabled() const
 {
     return m_params.m_diagnostics;
 }
diff --git a/src/appleseed/renderer/kernel/rendering/pixelrendererbase.h b/src/appleseed/renderer/kernel/rendering/pixelrendererbase.h
index 2998f7d3e9..6e2f212c12 100644
--- a/src/appleseed/renderer/kernel/rendering/pixelrendererbase.h
+++ b/src/appleseed/renderer/kernel/rendering/pixelrendererbase.h
@@ -67,7 +67,7 @@ class PixelRendererBase
         const size_t        thread_index,
         const ParamArray&   params);
 
-    bool is_diagnostics_enabled() const;
+    bool are_diagnostics_enabled() const;
 
     // This method is called before a tile gets rendered.
     void on_tile_begin(