diff --git a/fixincludes/fixincl.x b/fixincludes/fixincl.x
index 9dc05ea17f1..22997215ad2 100644
--- a/fixincludes/fixincl.x
+++ b/fixincludes/fixincl.x
@@ -2,11 +2,11 @@
  *
  * DO NOT EDIT THIS FILE   (fixincl.x)
  *
- * It has been AutoGen-ed  July 10, 2024 at 02:49:05 PM by AutoGen 5.18.16
+ * It has been AutoGen-ed  June 13, 2025 at 01:47:24 PM by AutoGen 5.18.16
  * From the definitions    inclhack.def
  * and the template file   fixincl
  */
-/* DO NOT SVN-MERGE THIS FILE, EITHER Wed Jul 10 14:49:05 CEST 2024
+/* DO NOT SVN-MERGE THIS FILE, EITHER Fri Jun 13 13:47:24 CEST 2025
  *
  * You must regenerate it.  Use the ./genfixes script.
  *
@@ -8981,7 +8981,7 @@ tSCC* apzStdio_Stdarg_HMachs[] = {
  *  content bypass pattern - skip fix if pattern found
  */
 tSCC zStdio_Stdarg_HBypass0[] =
-       "include.*(stdarg.h|machine/ansi.h)";
+       "include.*(stdarg.h|machine/ansi.h|_stdio.h)";
 
 #define    STDIO_STDARG_H_TEST_CT  1
 static tTestDesc aStdio_Stdarg_HTests[] = {
diff --git a/fixincludes/inclhack.def b/fixincludes/inclhack.def
index 1ac8e335419..d9f1521c727 100644
--- a/fixincludes/inclhack.def
+++ b/fixincludes/inclhack.def
@@ -4472,13 +4472,13 @@ fix = {
 
 /*
  *  Arrange for stdio.h to use stdarg.h to define __gnuc_va_list.
- *  On 4BSD-derived systems, stdio.h defers to machine/ansi.h; that's
- *  OK too.
+ *  On 4BSD-derived systems, stdio.h defers to machine/ansi.h, that's
+ *  OK too. modern macOS includes _stdio.h, and does not need the fix.
  */
 fix = {
     hackname = stdio_stdarg_h;
     files    = stdio.h;
-    bypass   = "include.*(stdarg\.h|machine/ansi\.h)";
+    bypass   = "include.*(stdarg\.h|machine/ansi\.h|_stdio\.h)";
     /*
      * On Solaris 10, this fix is unncessary; <stdio.h> includes
      * <iso/stdio_iso.h>, which includes <sys/va_list.h>.