diff --git a/patches/patchinstall.sh b/patches/patchinstall.sh
index e36e6311..cec00f60 100755
--- a/patches/patchinstall.sh
+++ b/patches/patchinstall.sh
@@ -51,7 +51,7 @@ usage()
 # Get the upstream commit sha
 upstream_commit()
 {
-	echo "0a50674c6aabb0368811ece4078a2bb69d7ea1bb"
+	echo "ce72f9b4263a898503c154a37df6bc9d43153f4b"
 }
 
 # Show version information
@@ -3071,12 +3071,13 @@ fi
 # | 	should run unelevated by default with Vista+ setting)
 # |
 # | Modified files:
-# |   *	dlls/shell32/shlexec.c, loader/wine.inf.in, server/process.c
+# |   *	dlls/msi/custom.c, dlls/shell32/shlexec.c, loader/wine.inf.in, server/process.c
 # |
 if test "$enable_server_default_integrity" -eq 1; then
 	patch_apply server-default_integrity/0001-server-Create-processes-using-a-limited-administrato.patch
 	patch_apply server-default_integrity/0002-shell32-Implement-the-runas-verb.patch
 	patch_apply server-default_integrity/0003-wine.inf-Set-the-EnableLUA-value-to-1.patch
+	patch_apply server-default_integrity/0004-msi-Create-the-custom-action-server-as-an-elevated-p.patch
 fi
 
 # Patchset setupapi-DiskSpaceList
diff --git a/patches/server-default_integrity/0004-msi-Create-the-custom-action-server-as-an-elevated-p.patch b/patches/server-default_integrity/0004-msi-Create-the-custom-action-server-as-an-elevated-p.patch
new file mode 100644
index 00000000..476725ba
--- /dev/null
+++ b/patches/server-default_integrity/0004-msi-Create-the-custom-action-server-as-an-elevated-p.patch
@@ -0,0 +1,68 @@
+From f2de1c5d2fcda876276e077b61f9fba5ff3f7f12 Mon Sep 17 00:00:00 2001
+From: Zebediah Figura <z.figura12@gmail.com>
+Date: Sun, 16 May 2021 20:49:05 -0500
+Subject: [PATCH] msi: Create the custom action server as an elevated process.
+
+Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=51143
+Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
+---
+ dlls/msi/custom.c | 24 ++++++++++++++++++++++--
+ 1 file changed, 22 insertions(+), 2 deletions(-)
+
+diff --git a/dlls/msi/custom.c b/dlls/msi/custom.c
+index fb03958eb11..874b9b92118 100644
+--- a/dlls/msi/custom.c
++++ b/dlls/msi/custom.c
+@@ -574,12 +574,28 @@ UINT CDECL __wine_msi_call_dll_function(DWORD client_pid, const GUID *guid)
+     return r;
+ }
+ 
++static HANDLE get_admin_token(void)
++{
++    TOKEN_ELEVATION_TYPE type;
++    TOKEN_LINKED_TOKEN linked;
++    DWORD size;
++
++    if (!GetTokenInformation(GetCurrentThreadEffectiveToken(), TokenElevationType, &type, sizeof(type), &size)
++            || type == TokenElevationTypeFull)
++        return NULL;
++
++    if (!GetTokenInformation(GetCurrentThreadEffectiveToken(), TokenLinkedToken, &linked, sizeof(linked), &size))
++        return NULL;
++    return linked.LinkedToken;
++}
++
+ static DWORD custom_start_server(MSIPACKAGE *package, DWORD arch)
+ {
+     WCHAR path[MAX_PATH], cmdline[MAX_PATH + 23];
+     PROCESS_INFORMATION pi = {0};
+     STARTUPINFOW si = {0};
+     WCHAR buffer[24];
++    HANDLE token;
+     void *cookie;
+     HANDLE pipe;
+ 
+@@ -601,14 +617,18 @@ static DWORD custom_start_server(MSIPACKAGE *package, DWORD arch)
+     lstrcatW(path, L"\\msiexec.exe");
+     swprintf(cmdline, ARRAY_SIZE(cmdline), L"%s -Embedding %d", path, GetCurrentProcessId());
+ 
++    token = get_admin_token();
++
+     if (is_wow64 && arch == SCS_64BIT_BINARY)
+     {
+         Wow64DisableWow64FsRedirection(&cookie);
+-        CreateProcessW(path, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
++        CreateProcessAsUserW(token, path, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
+         Wow64RevertWow64FsRedirection(cookie);
+     }
+     else
+-        CreateProcessW(path, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
++        CreateProcessAsUserW(token, path, cmdline, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
++
++    if (token) CloseHandle(token);
+ 
+     CloseHandle(pi.hThread);
+ 
+-- 
+2.30.2
+