diff --git a/include/vulkan/utility/vk_format_utils.h b/include/vulkan/utility/vk_format_utils.h
index 9af341c..fb3456d 100644
--- a/include/vulkan/utility/vk_format_utils.h
+++ b/include/vulkan/utility/vk_format_utils.h
@@ -227,7 +227,7 @@ inline bool vkuFormatIsPacked(VkFormat format);
 inline bool vkuFormatRequiresYcbcrConversion(VkFormat format);
 
 // Returns whether a VkFormat is XChromaSubsampled
-// This corresponds to formats with _422 in their name
+// This corresponds to formats with _422 or 420 in their name
 inline bool vkuFormatIsXChromaSubsampled(VkFormat format);
 
 // Returns whether a VkFormat is YChromaSubsampled
diff --git a/scripts/generators/format_utils_generator.py b/scripts/generators/format_utils_generator.py
index c65463d..7fe0aab 100644
--- a/scripts/generators/format_utils_generator.py
+++ b/scripts/generators/format_utils_generator.py
@@ -178,7 +178,7 @@ inline bool vkuFormatIsPacked(VkFormat format);
 inline bool vkuFormatRequiresYcbcrConversion(VkFormat format);
 
 // Returns whether a VkFormat is XChromaSubsampled
-// This corresponds to formats with _422 in their name
+// This corresponds to formats with _422 or 420 in their name
 inline bool vkuFormatIsXChromaSubsampled(VkFormat format);
 
 // Returns whether a VkFormat is YChromaSubsampled