diff --git a/packages/@tailwindcss-upgrade/src/migrate-js-config.ts b/packages/@tailwindcss-upgrade/src/migrate-js-config.ts
index 5d4e5b0c8810..795b9b271d64 100644
--- a/packages/@tailwindcss-upgrade/src/migrate-js-config.ts
+++ b/packages/@tailwindcss-upgrade/src/migrate-js-config.ts
@@ -87,10 +87,10 @@ async function migrateTheme(
     base,
     config: { ...unresolvedConfig, plugins: [], presets: undefined },
   }
-  let { resolvedConfig, resetThemeKeys } = resolveConfig(designSystem, [configToResolve])
+  let { resolvedConfig, replacedThemeKeys } = resolveConfig(designSystem, [configToResolve])
 
   let resetNamespaces = new Map<string, boolean>(
-    Array.from(resetThemeKeys.entries()).map(([key]) => [key, false]),
+    Array.from(replacedThemeKeys.entries()).map(([key]) => [key, false]),
   )
 
   let prevSectionKey = ''
diff --git a/packages/tailwindcss/src/compat/apply-config-to-theme.ts b/packages/tailwindcss/src/compat/apply-config-to-theme.ts
index 6e6c245118c6..9edf038e4dc1 100644
--- a/packages/tailwindcss/src/compat/apply-config-to-theme.ts
+++ b/packages/tailwindcss/src/compat/apply-config-to-theme.ts
@@ -24,8 +24,8 @@ export function applyConfigToTheme(
   { theme }: ResolvedConfig,
   replacedThemeKeys: Set<string>,
 ) {
-  for (let resetThemeKey of replacedThemeKeys) {
-    let name = keyPathToCssProperty([resetThemeKey])
+  for (let replacedThemeKey of replacedThemeKeys) {
+    let name = keyPathToCssProperty([replacedThemeKey])
     if (!name) continue
 
     designSystem.theme.clearNamespace(`--${name}`, ThemeOptions.DEFAULT)