diff --git a/libxcrypt-4.4.33-yescrypt_platform_cast_performance.patch b/libxcrypt-4.4.33-yescrypt_platform_cast_performance.patch
new file mode 100644
index 0000000..c79f5e0
--- /dev/null
+++ b/libxcrypt-4.4.33-yescrypt_platform_cast_performance.patch
@@ -0,0 +1,23 @@
+From 9d5e7b7307f264c2d177a1f014fa3a3b9da524df Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bj=C3=B6rn=20Esser?= <besser82@fedoraproject.org>
+Date: Sun, 20 Nov 2022 09:57:15 +0100
+Subject: [PATCH] alg-yescrypt-platform.c: Optimize some cast operation for
+ performance.
+
+---
+ lib/alg-yescrypt-platform.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/alg-yescrypt-platform.c b/lib/alg-yescrypt-platform.c
+index d68af2d..fbad1dc 100644
+--- a/lib/alg-yescrypt-platform.c
++++ b/lib/alg-yescrypt-platform.c
+@@ -59,7 +59,7 @@ static void *alloc_region(yescrypt_region_t *region, size_t size)
+ 	if (base != MAP_FAILED) {
+ 		base_size = new_size;
+ 	} else if (flags & MAP_HUGETLB) {
+-		flags &= (unsigned int)~(MAP_HUGETLB | MAP_HUGE_2MB);
++		flags &= ~(unsigned int)(MAP_HUGETLB | MAP_HUGE_2MB);
+ 		base = mmap(NULL, size, PROT_READ | PROT_WRITE, (int)flags, -1, 0);
+ 	}
+ 
diff --git a/libxcrypt.spec b/libxcrypt.spec
index e9811b0..5abee57 100644
--- a/libxcrypt.spec
+++ b/libxcrypt.spec
@@ -175,6 +175,7 @@ Source2:        %{url}/releases/download/v%{version}/%{name}-gpgkey.gpg
 Source3:        %{url}/releases/download/v%{version}/%{name}-%{version}.tar.xz.sha256sum
 
 # Patch 0000 - 2999: Backported patches from upstream.
+Patch0000:      %{url}/commit/9d5e7b7307f2.patch#/%{name}-4.4.33-yescrypt_platform_cast_performance.patch
 
 # Patch 3000 - 5999: Backported patches from pull requests.
 
@@ -577,6 +578,7 @@ done
 %changelog
 * Mon Nov 28 2022 Björn Esser <besser82@fedoraproject.org> - 4.4.33-3
 - Convert License to SPDX expression
+- Add upstream patch to improve performance on some type-cast operations
 
 * Mon Nov 21 2022 Björn Esser <besser82@fedoraproject.org> - 4.4.33-2
 - Do not BR the compat package during bootstrap