diff --git a/v2/internal/frontend/desktop/linux/single_instance.go b/v2/internal/frontend/desktop/linux/single_instance.go
index 9d6426e14..0317dee49 100644
--- a/v2/internal/frontend/desktop/linux/single_instance.go
+++ b/v2/internal/frontend/desktop/linux/single_instance.go
@@ -7,6 +7,7 @@ import (
 	"encoding/json"
 	"github.com/godbus/dbus/v5"
 	"github.com/wailsapp/wails/v2/pkg/options"
+	"log"
 	"os"
 	"strings"
 )
@@ -55,8 +56,15 @@ func SetupSingleInstance(uniqueID string) {
 		data := options.SecondInstanceData{
 			Args: os.Args[1:],
 		}
+		data.WorkingDirectory, err = os.Getwd()
+		if err != nil {
+			log.Printf("Failed to get working directory: %v", err)
+			return
+		}
+
 		serialized, err := json.Marshal(data)
 		if err != nil {
+			log.Printf("Failed to marshal data: %v", err)
 			return
 		}
 
diff --git a/v2/internal/frontend/desktop/windows/single_instance.go b/v2/internal/frontend/desktop/windows/single_instance.go
index 222d9fe1a..a02b7edb9 100644
--- a/v2/internal/frontend/desktop/windows/single_instance.go
+++ b/v2/internal/frontend/desktop/windows/single_instance.go
@@ -7,6 +7,7 @@ import (
 	"github.com/wailsapp/wails/v2/internal/frontend/desktop/windows/winc/w32"
 	"github.com/wailsapp/wails/v2/pkg/options"
 	"golang.org/x/sys/windows"
+	"log"
 	"os"
 	"syscall"
 	"unsafe"
@@ -51,7 +52,16 @@ func SetupSingleInstance(uniqueId string) {
 				data := options.SecondInstanceData{
 					Args: os.Args[1:],
 				}
-				serialized, _ := json.Marshal(data)
+				data.WorkingDirectory, err = os.Getwd()
+				if err != nil {
+					log.Printf("Failed to get working directory: %v", err)
+					return
+				}
+				serialized, err := json.Marshal(data)
+				if err != nil {
+					log.Printf("Failed to marshal data: %v", err)
+					return
+				}
 
 				SendMessage(hwnd, string(serialized))
 				// exit second instance of app after sending message
diff --git a/website/src/pages/changelog.mdx b/website/src/pages/changelog.mdx
index f22628551..8f28a93c5 100644
--- a/website/src/pages/changelog.mdx
+++ b/website/src/pages/changelog.mdx
@@ -24,6 +24,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - Docs for IsZoomControlEnabled and ZoomFactor. Fixed by @leaanthony in [PR](https://github.com/wailsapp/wails/pull/3137)
 - Fixed `-compiler` flag for `wails build`, `wails dev` and `wails generate module`. Fixed in [PR](https://github.com/wailsapp/wails/pull/3121) by [@xtrafrancyz](https://github.com/xtrafrancyz)
+- Fixed uninitialized `SecondInstanceData.WorkingDirectory` on linux and windows ([#3154](https://github.com/wailsapp/wails/pull/3154)).
 
 ## v2.7.1 - 2023-12-10