diff --git a/sphinx_doc_src/cmds/fish.rst b/sphinx_doc_src/cmds/fish.rst
index db2dd60db..177e781b9 100644
--- a/sphinx_doc_src/cmds/fish.rst
+++ b/sphinx_doc_src/cmds/fish.rst
@@ -20,7 +20,7 @@ The following options are available:
 
 - ``-C`` or ``--init-command=COMMANDS`` evaluate the specified commands after reading the configuration, before running the command specified by ``-c`` or reading interactive input
 
-- ``-d`` or ``--debug=DEBUG_LEVEL`` specify the verbosity level of fish. A higher number means higher verbosity. The default level is 1.
+- ``-d`` or ``--debug=CATEGORY_GLOB`` enables debug output and specifies a glob for matching debug categories (like ``fish -d``). Defaults to empty.
 
 - ``-o`` or ``--debug-output=path`` Specify a file path to receive the debug output. The default is stderr.
 
diff --git a/sphinx_doc_src/cmds/fish_indent.rst b/sphinx_doc_src/cmds/fish_indent.rst
index 0049f84f3..73919a5b6 100644
--- a/sphinx_doc_src/cmds/fish_indent.rst
+++ b/sphinx_doc_src/cmds/fish_indent.rst
@@ -26,7 +26,7 @@ The following options are available:
 
 - ``--html`` outputs HTML, which supports syntax highlighting if the appropriate CSS is defined. The CSS class names are the same as the variable names, such as ``fish_color_command``.
 
-- ``-d`` or ``--debug=DEBUG_LEVEL`` enables debug output and specifies a verbosity level (like ``fish -d``). Defaults to 0.
+- ``-d`` or ``--debug=CATEGORY_GLOB`` enables debug output and specifies a glob for matching debug categories (like ``fish -d``). Defaults to empty.
 
 - ``-D`` or ``--debug-stack-frames=DEBUG_LEVEL`` specify how many stack frames to display when debug messages are written. The default is zero. A value of 3 or 4 is usually sufficient to gain insight into how a given debug call was reached but you can specify a value up to 128.
 
diff --git a/sphinx_doc_src/cmds/fish_key_reader.rst b/sphinx_doc_src/cmds/fish_key_reader.rst
index 83869cf68..7d5e4d3d1 100644
--- a/sphinx_doc_src/cmds/fish_key_reader.rst
+++ b/sphinx_doc_src/cmds/fish_key_reader.rst
@@ -20,7 +20,7 @@ The following options are available:
 
 - ``-c`` or ``--continuous`` begins a session where multiple key sequences can be inspected. By default the program exits after capturing a single key sequence.
 
-- ``-d`` or ``--debug=DEBUG_LEVEL`` enables debug output and specifies a verbosity level (like ``fish -d``). Defaults to 0.
+- ``-d`` or ``--debug=CATEGORY_GLOB`` enables debug output and specifies a glob for matching debug categories (like ``fish -d``). Defaults to empty.
 
 - ``-D`` or ``--debug-stack-frames=DEBUG_LEVEL`` specify how many stack frames to display when debug messages are written. The default is zero. A value of 3 or 4 is usually sufficient to gain insight into how a given debug call was reached but you can specify a value up to 128.