diff --git a/manual/files/custom_properties.rst b/manual/files/custom_properties.rst
index 66019db8a..4f222b707 100644
--- a/manual/files/custom_properties.rst
+++ b/manual/files/custom_properties.rst
@@ -115,7 +115,7 @@ Subtype
 
    For regular floats:
 
-   :Plane Data: Data values do not have any special behavior.
+   :Plain Data: Data values do not have any special behavior.
    :Pixel: A measure digital image resolution.
    :Percentage: The displayed value is a percentage, typically you will want the Min and Max values to be 0 and 100.
    :Factor: A percentage between an upper and lower bound which typical have a numerical significance.
@@ -130,7 +130,7 @@ Subtype
 
    For float arrays:
 
-   :Plane Data: Data values do not have any special behavior.
+   :Plain Data: Data values do not have any special behavior.
    :Linear Color: Color in linear color space.
    :Gamma-Corrected Color: Color in gamma corrected color space.
    :Euler Angles: :term:`Euler Rotation` angles.