diff --git a/.changeset/fix-table-core-dts-module-scope.md b/.changeset/fix-table-core-dts-module-scope.md
new file mode 100644
index 0000000000..780a2ad155
--- /dev/null
+++ b/.changeset/fix-table-core-dts-module-scope.md
@@ -0,0 +1,5 @@
+---
+'@tanstack/table-core': patch
+---
+
+fix(table-core): export RangeValue and ensure emitted declaration files preserve module scope
diff --git a/packages/table-core/src/features/row-aggregation/aggregationFns.ts b/packages/table-core/src/features/row-aggregation/aggregationFns.ts
index 22fa2e716f..ed2ab355ef 100755
--- a/packages/table-core/src/features/row-aggregation/aggregationFns.ts
+++ b/packages/table-core/src/features/row-aggregation/aggregationFns.ts
@@ -1,6 +1,6 @@
 import { constructAggregationFn } from './rowAggregationFeature.types'
 
-type RangeValue = Date | number
+export type RangeValue = Date | number
 
 function isNumber(value: unknown): value is number {
   return typeof value === 'number'
diff --git a/scripts/rewrite-table-core-dts.mjs b/scripts/rewrite-table-core-dts.mjs
index 1d8846d39b..1ee8f41a1e 100644
--- a/scripts/rewrite-table-core-dts.mjs
+++ b/scripts/rewrite-table-core-dts.mjs
@@ -282,10 +282,22 @@ function rewriteDeclaration(source, file) {
   next = next.replaceAll('Column_Internal', 'Column')
 
   next = ensurePublicTypeImports(next, file)
+  next = ensureModuleScope(next)
 
   return next
 }
 
+function ensureModuleScope(source) {
+  if (
+    !/\bexport\s*(?:\{|\*|default|type|interface|function|class|const|let|var|enum)\b/.test(
+      source,
+    )
+  ) {
+    return `${source.trimEnd()}\n\nexport {};\n`
+  }
+  return source
+}
+
 const files = walkDeclarationFiles(distDir)
 
 for (const file of files) {