diff --git a/packages/eslint-plugin-antfu/src/rules/generic-spacing.test.ts b/packages/eslint-plugin-antfu/src/rules/generic-spacing.test.ts
index dc98507fa6..c3aa2d3c41 100644
--- a/packages/eslint-plugin-antfu/src/rules/generic-spacing.test.ts
+++ b/packages/eslint-plugin-antfu/src/rules/generic-spacing.test.ts
@@ -20,6 +20,9 @@ type Foo<
   `interface Log {
   <T>(name: T): void
 }`,
+`interface Foo {
+  foo?: <T>(name: T) => void
+}`,
 ]
 const invalids = [
   ['type Foo<T=true> = T', 'type Foo<T = true> = T'],
diff --git a/packages/eslint-plugin-antfu/src/rules/generic-spacing.ts b/packages/eslint-plugin-antfu/src/rules/generic-spacing.ts
index 280d3e7181..6df03f9d73 100644
--- a/packages/eslint-plugin-antfu/src/rules/generic-spacing.ts
+++ b/packages/eslint-plugin-antfu/src/rules/generic-spacing.ts
@@ -23,7 +23,7 @@ export default createEslintRule<Options, MessageIds>({
     const sourceCode = context.getSourceCode()
     return {
       TSTypeParameterDeclaration: (node) => {
-        if (!['TSCallSignatureDeclaration', 'ArrowFunctionExpression'].includes(node.parent.type)) {
+        if (!['TSCallSignatureDeclaration', 'ArrowFunctionExpression', 'TSFunctionType'].includes(node.parent.type)) {
           const pre = sourceCode.text.slice(0, node.range[0])
           const preSpace = pre.match(/(\s+)$/)?.[0]
           // strip space before <T>