diff --git a/packages/compiler-sfc/src/script/resolveType.ts b/packages/compiler-sfc/src/script/resolveType.ts
index 146c454729c..8e647416de2 100644
--- a/packages/compiler-sfc/src/script/resolveType.ts
+++ b/packages/compiler-sfc/src/script/resolveType.ts
@@ -778,7 +778,7 @@ function importSourceToScope(
   if (!resolved) {
     if (source.startsWith('.')) {
       // relative import - fast path
-      const filename = joinPaths(scope.filename, '..', source)
+      const filename = joinPaths(normalizePath(scope.filename), '..', normalizePath(source))
       resolved = resolveExt(filename, fs)
     } else {
       // module or aliased import - use full TS resolution, only supported in Node