diff --git a/man/compton.1.asciidoc b/man/compton.1.asciidoc
index 775c570..37d30e0 100644
--- a/man/compton.1.asciidoc
+++ b/man/compton.1.asciidoc
@@ -392,6 +392,7 @@ Available options of the 'blur' section are: ::
   *method*:::
     A string. Controls the blur method. Corresponds to the `--blur-method` command line option. Available choices are:
       'none' to disable blurring; 'gaussian' for gaussian blur; 'box' for box blur; 'kernel' for convolution blur with a custom kernel.
+    Note: 'gaussian' and 'box' blur methods are only supported by the experimental backends.
 
   *size*:::
     An integer. The size of the blur kernel, required by 'gaussian' and 'box' blur methods. For the 'kernel' method, the size is included in the kernel. Corresponds to the `--blur-size` command line option.