diff --git a/cpython-unix/build-libffi.sh b/cpython-unix/build-libffi.sh
index 33cc3d9b..7a50589e 100755
--- a/cpython-unix/build-libffi.sh
+++ b/cpython-unix/build-libffi.sh
@@ -13,40 +13,6 @@ tar -xf libffi-${LIBFFI_VERSION}.tar.gz
 
 pushd libffi-${LIBFFI_VERSION}
 
-# Upstream commit ce077e5565366171aa1b4438749b0922fce887a4 to resolve a missing declaration.
-patch -p1 << 'EOF'
-diff --git a/include/ffi_common.h b/include/ffi_common.h
-index 2bd31b0..c53a794 100644
---- a/include/ffi_common.h
-+++ b/include/ffi_common.h
-@@ -128,6 +128,10 @@ void *ffi_data_to_code_pointer (void *data) FFI_HIDDEN;
-    static trampoline. */
- int ffi_tramp_is_present (void *closure) FFI_HIDDEN;
-
-+/* Return a file descriptor of a temporary zero-sized file in a
-+   writable and executable filesystem. */
-+int open_temp_exec_file(void) FFI_HIDDEN;
-+
- /* Extended cif, used in callback from assembly routine */
- typedef struct
- {
-diff --git a/src/tramp.c b/src/tramp.c
-index 7e005b0..5f19b55 100644
---- a/src/tramp.c
-+++ b/src/tramp.c
-@@ -39,6 +39,10 @@
- #ifdef __linux__
- #define _GNU_SOURCE 1
- #endif
-+
-+#include <ffi.h>
-+#include <ffi_common.h>
-+
- #include <stdio.h>
- #include <unistd.h>
- #include <stdlib.h>
-EOF
-
 EXTRA_CONFIGURE=
 
 # mkostemp() was introduced in macOS 10.10 and libffi doesn't have
diff --git a/pythonbuild/downloads.py b/pythonbuild/downloads.py
index 344e6cb4..4c669a8f 100644
--- a/pythonbuild/downloads.py
+++ b/pythonbuild/downloads.py
@@ -126,10 +126,10 @@
         "license_file": "LICENSE.libffi.txt",
     },
     "libffi": {
-        "url": "https://github.com/libffi/libffi/releases/download/v3.4.4/libffi-3.4.4.tar.gz",
-        "size": 1362394,
-        "sha256": "d66c56ad259a82cf2a9dfc408b32bf5da52371500b84745f7fb8b645712df676",
-        "version": "3.4.4",
+        "url": "https://github.com/libffi/libffi/releases/download/v3.4.6/libffi-3.4.6.tar.gz",
+        "size": 1391684,
+        "sha256": "b0dea9df23c863a7a50e825440f3ebffabd65df1497108e5d437747843895a4e",
+        "version": "3.4.6",
         "library_names": ["ffi"],
         "licenses": ["MIT"],
         "license_file": "LICENSE.libffi.txt",