diff --git a/tools/install/win/lazarus.iss b/tools/install/win/lazarus.iss
index 6175abcba2..508f404f60 100644
--- a/tools/install/win/lazarus.iss
+++ b/tools/install/win/lazarus.iss
@@ -32,6 +32,7 @@ WizardImageFile=lazarus_install_cheetah.bmp
 WizardSmallImageFile=lazarus_install_cheetah_small.bmp
 WizardImageStretch=false
 ShowTasksTreeLines=true
+TimeStampRounding=0
 
 [Tasks]
 Name: desktopicon; Description: {cm:CreateDesktopIcon}; GroupDescription: {cm:AdditionalIcons}; Flags: unchecked