diff --git a/emulators/adamem/files/patch-Z80IO.h b/emulators/adamem/files/patch-Z80IO.h
index f5cd2495b369..9402c936e420 100644
--- a/emulators/adamem/files/patch-Z80IO.h
+++ b/emulators/adamem/files/patch-Z80IO.h
@@ -1,23 +1,27 @@
-Index: Z80IO.h
-@@ -11,7 +11,6 @@
+--- Z80IO.h.orig	1999-02-14 19:45:30 UTC
++++ Z80IO.h
+@@ -11,9 +11,8 @@
  /****************************************************************************/
  
  #define INLINE_OP                     /* Inline Z80_RDOP()                  */
 -#define INLINE_MEM                    /* Inline Z80_RDMEM() and Z80_WRMEM() */
  
- #ifdef __GNUC__
+-#ifdef __GNUC__
++#if defined(__GNUC__) && (defined(__amd64__) || defined(__i386__))
  #define FASTCALL        __attribute__ ((regparm(3)))
-@@ -36,11 +35,11 @@
+ #ifdef INLINE_MEM
+ #define INLINE_MEM_GNU
+@@ -36,11 +35,11 @@ void Z80_Out (unsigned Port,byte Value) FASTCALL;
   /***************************************************************************/
   /* Read a byte from given memory location                                  */
   /***************************************************************************/
 - unsigned Z80_RDMEM(dword a) FASTCALL;
 + unsigned Z80_RDMEM(dword a);
   /***************************************************************************/
   /* Write a byte to given memory location                                   */
   /***************************************************************************/
 - void Z80_WRMEM(dword a,byte v) FASTCALL;
 + void Z80_WRMEM(dword a,byte v);
  #else
   extern byte *AddrTabl[256];
   extern byte *WriteAddrTabl[256];