diff --git a/build/win32/code.iss b/build/win32/code.iss
index 73b031fe643..409bae2c2f5 100644
--- a/build/win32/code.iss
+++ b/build/win32/code.iss
@@ -19,6 +19,7 @@ OutputBaseFilename=VSCodeSetup
 Compression=lzma
 SolidCompression=yes
 AppMutex={#AppMutex}
+SetupMutex={#AppMutex}setup
 WizardImageFile={#RepoDir}\resources\win32\inno-big.bmp
 WizardSmallImageFile={#RepoDir}\resources\win32\inno-small.bmp
 SetupIconFile={#RepoDir}\resources\win32\code.ico