diff --git a/tools/rockboxdev.sh b/tools/rockboxdev.sh
index 54b5d8bff3..361a4f5f2d 100755
--- a/tools/rockboxdev.sh
+++ b/tools/rockboxdev.sh
@@ -442,11 +442,15 @@ build() {
 
         # For Apple targets only
         if [ "$system" == "Darwin" ] ; then
-            patch="$patch apple_silicon.patch"
+            patch="$patch apple_silicon.patch apple_silicon-zlib.patch"
             EXTRA_CXXFLAGS="-fbracket-depth=512"
         fi
     fi
 
+    if [ "$toolname" == "binutils" ] && [ "$system" == "Darwin" ]; then
+        patch="$patch apple_silicon-zlib.patch"
+    fi
+
     # create build directory
     if test -d $builddir; then
         if test ! -w $builddir; then
diff --git a/tools/toolchain-patches/apple_silicon-zlib.patch b/tools/toolchain-patches/apple_silicon-zlib.patch
new file mode 100644
index 0000000000..b35e94f023
--- /dev/null
+++ b/tools/toolchain-patches/apple_silicon-zlib.patch
@@ -0,0 +1,23 @@
+diff --git a/zlib/zutil.h b/zlib/zutil.h
+index ed6b127e..3186e991 100644
+--- a/zlib/zutil.h
++++ b/zlib/zutil.h
+@@ -118,17 +118,8 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
+ #  endif
+ #endif
+ 
+-#if defined(MACOS) || defined(TARGET_OS_MAC)
++#if defined(MACOS)
+ #  define OS_CODE  0x07
+-#  ifndef Z_SOLO
+-#    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+-#      include <unix.h> /* for fdopen */
+-#    else
+-#      ifndef fdopen
+-#        define fdopen(fd,mode) NULL /* No fdopen() */
+-#      endif
+-#    endif
+-#  endif
+ #endif
+ 
+ #ifdef TOPS20