diff --git a/zfsinstaller/ZFSInstall-debug.iss b/zfsinstaller/ZFSInstall-debug.iss
index a511299c..dfbe8e96 100644
--- a/zfsinstaller/ZFSInstall-debug.iss
+++ b/zfsinstaller/ZFSInstall-debug.iss
@@ -20,7 +20,7 @@ AppPublisher={#MyAppPublisher}
 AppPublisherURL={#MyAppURL}
 AppSupportURL={#MyAppURL}
 AppUpdatesURL={#MyAppURL}
-DefaultDirName={pf}\{#MyAppName}
+DefaultDirName={pf64}\{#MyAppName}
 DefaultGroupName={#MyAppName}
 AllowNoIcons=yes
 LicenseFile={#SourcePath}\OPENSOLARIS.LICENSE.txt
diff --git a/zfsinstaller/ZFSInstall-release.iss b/zfsinstaller/ZFSInstall-release.iss
index 6ef0b145..15aa0bad 100644
--- a/zfsinstaller/ZFSInstall-release.iss
+++ b/zfsinstaller/ZFSInstall-release.iss
@@ -20,7 +20,7 @@ AppPublisher={#MyAppPublisher}
 AppPublisherURL={#MyAppURL}
 AppSupportURL={#MyAppURL}
 AppUpdatesURL={#MyAppURL}
-DefaultDirName={pf}\{#MyAppName}
+DefaultDirName={pf64}\{#MyAppName}
 DefaultGroupName={#MyAppName}
 AllowNoIcons=yes
 LicenseFile={#SourcePath}\OPENSOLARIS.LICENSE.txt