diff --git a/CHANGELOG.md b/CHANGELOG.md
index d5da9ab3..2624d7e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Sort classes inside `className` in Astro ([#215](https://github.com/tailwindlabs/prettier-plugin-tailwindcss/pull/215))
+- Support member access on function calls ([#218](https://github.com/tailwindlabs/prettier-plugin-tailwindcss/pull/218))
 
 ## [0.5.4] - 2023-08-31
 
diff --git a/package.json b/package.json
index 47d834b8..1fe7cb94 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "predev": "npm run _pre",
     "dev": "npm run _esbuild -- --watch",
     "pretest": "node scripts/install-fixture-deps.js",
-    "test": "jest",
+    "test": "NODE_OPTIONS=--experimental-vm-modules jest",
     "prepublishOnly": "npm run build && node scripts/copy-licenses.js",
     "format": "prettier \"src/**/*.js\" \"scripts/**/*.js\" \"tests/test.js\" --write --print-width 100 --single-quote --no-semi --plugin-search-dir ./tests",
     "release-channel": "node ./scripts/release-channel.js",
diff --git a/src/index.js b/src/index.js
index 6700a1d5..62337b48 100644
--- a/src/index.js
+++ b/src/index.js
@@ -460,6 +460,37 @@ function isSortableTemplateExpression(node, functions) {
   return false
 }
 
+/**
+ *
+ * @param {import('@babel/types').CallExpression | import('ast-types').namedTypes.CallExpression} node
+ * @param {Set<string>} functions
+ * @returns {boolean}
+ */
+function isSortableCallExpression(node, functions) {
+  if (!node.arguments?.length) {
+    return false
+  }
+
+  if (node.callee.type === 'Identifier') {
+    return functions.has(node.callee.name)
+  }
+
+  if (node.callee.type === 'MemberExpression') {
+    let expr = node.callee.object
+
+    // If the tag is a MemberExpression we should traverse all MemberExpression's until we find the leading Identifier
+    while (expr.type === 'MemberExpression') {
+      expr = expr.object
+    }
+
+    if (expr.type === 'Identifier') {
+      return functions.has(expr.name)
+    }
+  }
+
+  return false
+}
+
 /**
  * @param {import('@babel/types').Node} ast
  * @param {TransformerContext} param1
@@ -502,11 +533,7 @@ function transformJavaScript(ast, { env }) {
 
     /** @param {import('@babel/types').CallExpression} node */
     CallExpression(node) {
-      if (!node.arguments?.length) {
-        return
-      }
-
-      if (!functions.has(node.callee?.name ?? '')) {
+      if (!isSortableCallExpression(node, functions)) {
         return
       }
 
diff --git a/tests/fixtures.test.js b/tests/fixtures.test.js
index a19fa567..0ea7f30e 100644
--- a/tests/fixtures.test.js
+++ b/tests/fixtures.test.js
@@ -76,6 +76,10 @@ const f = tw.foo\`p-2 sm:p-1\`;
 const g = tw.foo.bar\`p-2 sm:p-1\`;
 const h = no.foo\`sm:p-1 p-2\`;
 const i = no.tw\`sm:p-1 p-2\`;
+const k = tw.foo("p-2 sm:p-1");
+const l = tw.foo.bar("p-2 sm:p-1");
+const m = no.foo("sm:p-1 p-2");
+const n = no.tw("sm:p-1 p-2");
 
 const A = (props) => <div className={props.sortMe} />;
 const B = () => <A sortMe="p-2 sm:p-1" dontSort="sm:p-1 p-2" />;`,
diff --git a/tests/fixtures/custom-jsx/index.jsx b/tests/fixtures/custom-jsx/index.jsx
index cff84820..2a423f76 100644
--- a/tests/fixtures/custom-jsx/index.jsx
+++ b/tests/fixtures/custom-jsx/index.jsx
@@ -10,6 +10,10 @@ const f = tw.foo`sm:p-1 p-2`;
 const g = tw.foo.bar`sm:p-1 p-2`;
 const h = no.foo`sm:p-1 p-2`;
 const i = no.tw`sm:p-1 p-2`;
+const k = tw.foo('sm:p-1 p-2');
+const l = tw.foo.bar('sm:p-1 p-2');
+const m = no.foo('sm:p-1 p-2');
+const n = no.tw('sm:p-1 p-2');
 
 const A = (props) => <div className={props.sortMe} />;
 const B = () => <A sortMe="sm:p-1 p-2" dontSort="sm:p-1 p-2" />;