diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24ecffc1c..60820c67a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+### Fixed
+
+- Fixed the `ADDRESS` function to omit the sheet separator (`!`) when the `sheetName` argument is an empty string, consistently with Excel, in both A1 and R1C1 styles. [#1739](https://github.com/handsontable/hyperformula/pull/1739)
+
 ## [3.4.0] - 2026-08-10
 
 ### Added
diff --git a/src/interpreter/plugin/AddressPlugin.ts b/src/interpreter/plugin/AddressPlugin.ts
index 7e37a42e4..b0ab810dd 100644
--- a/src/interpreter/plugin/AddressPlugin.ts
+++ b/src/interpreter/plugin/AddressPlugin.ts
@@ -67,7 +67,7 @@ export class AddressPlugin extends FunctionPlugin implements FunctionPluginTypec
       const colLetter = columnIndexToLabel(col - 1)
       let sheetPrefix = ''
 
-      if (sheetName !== undefined && sheetName !== null) {
+      if (sheetName !== undefined && sheetName !== null && sheetName !== '') {
         sheetPrefix = `${sheetName}!`
       }