diff --git a/manual/compositing/types/filter/posterize.rst b/manual/compositing/types/filter/posterize.rst
index d814545da..08b0f7707 100644
--- a/manual/compositing/types/filter/posterize.rst
+++ b/manual/compositing/types/filter/posterize.rst
@@ -21,7 +21,7 @@ Image
    Standard color input.
 Steps
    The number of colors per channel;
-   A value of 8 will result is :math:`8^3 = 512` total colors.
+   A value of 8 will result in :math:`8^3 = 512` total colors.
 
 
 Properties