diff --git a/.changeset/funny-dogs-learn.md b/.changeset/funny-dogs-learn.md
new file mode 100644
index 00000000..25c33fcd
--- /dev/null
+++ b/.changeset/funny-dogs-learn.md
@@ -0,0 +1,5 @@
+---
+"@10up/stylelint-config": patch
+---
+
+Update `custom-property-pattern` regular expression to also match custom properties that use a singular `-` as a group separator
diff --git a/packages/stylelint-config/index.js b/packages/stylelint-config/index.js
index 432659ae..f4fd1d3c 100644
--- a/packages/stylelint-config/index.js
+++ b/packages/stylelint-config/index.js
@@ -25,7 +25,7 @@ module.exports = {
 			},
 		],
 		'custom-property-pattern': [
-			'^([a-z][a-z0-9]*)(-[a-z0-9]+)*$|^wp--([a-z][a-z0-9]*)(--[a-z0-9]+)*$',
+			'^([a-z][a-z0-9]*)(-[a-z0-9]+)*$|^wp--([a-z][a-z0-9]*)([-]{1,2}[a-z0-9]+)*$',
 			{
 				message: 'Expected custom property name to be kebab-case or wp--kebab--case',
 			},