diff --git a/sys/arch/arm/include/ansi.h b/sys/arch/arm/include/ansi.h
index 0a0acf758..a5a1f5410 100644
--- a/sys/arch/arm/include/ansi.h
+++ b/sys/arch/arm/include/ansi.h
@@ -31,7 +31,6 @@
  *	from: @(#)ansi.h	8.2 (Berkeley) 1/4/94
  */
 
-
 #ifndef	_ANSI_H_
 #define	_ANSI_H_
 
@@ -49,9 +48,13 @@
  *	#endif
  */
 #define	_BSD_CLOCK_T_		unsigned int	/* clock() */
+#if defined(__minix)
+/* To change this, this require also changing the defintion of size_t in GCC,
+ * and to adapt the following headers: int_fmt.h, int_types.h */
 #define	_BSD_PTRDIFF_T_		int		/* ptr1 - ptr2 */
 #define	_BSD_SIZE_T_		unsigned int	/* sizeof() */
 #define	_BSD_SSIZE_T_		int		/* byte count or error */
+#endif /* defined(__minix) */
 #define	_BSD_TIME_T_		__int64_t	/* time() */
 #define	_BSD_CLOCKID_T_		int		/* clockid_t */
 #define	_BSD_TIMER_T_		int		/* timer_t */
diff --git a/sys/arch/arm/include/asm.h b/sys/arch/arm/include/asm.h
index f5845cd24..d28bf53d2 100644
--- a/sys/arch/arm/include/asm.h
+++ b/sys/arch/arm/include/asm.h
@@ -88,12 +88,6 @@
 #define	ASENTRY_NP(y)	_ENTRY(_ASM_LABEL(y))
 #define	ASEND(y)	_END(_ASM_LABEL(y))
 
-#if defined(__minix)
-#define _LABEL(x) \
-	.globl x; x:
-#define	LABEL(y)	_LABEL(_C_LABEL(y))
-#endif /* defined(__minix) */
-
 #define	ASMSTR		.asciz
 
 #if defined(PIC)
@@ -182,9 +176,13 @@
 # define RETc(c)	__CONCAT(mov,c)	pc, lr
 #endif
 
-#ifdef __minix
+#if defined(__minix)
+#define _LABEL(x) \
+	.globl x; x:
+#define	LABEL(y)	_LABEL(_C_LABEL(y))
+
 #define IMPORT(sym)               \
         .extern _C_LABEL(sym)
-#endif
+#endif /* defined(__minix) */
 
 #endif /* !_ARM_ASM_H_ */
diff --git a/sys/arch/i386/include/ansi.h b/sys/arch/i386/include/ansi.h
index 77a27bd32..cdfafc5ed 100644
--- a/sys/arch/i386/include/ansi.h
+++ b/sys/arch/i386/include/ansi.h
@@ -31,7 +31,6 @@
  *	@(#)ansi.h	8.2 (Berkeley) 1/4/94
  */
 
-
 #ifndef	_I386_ANSI_H_
 #define	_I386_ANSI_H_
 
diff --git a/sys/arch/i386/include/asm.h b/sys/arch/i386/include/asm.h
index a08f4e4e3..1ceb6ea07 100644
--- a/sys/arch/i386/include/asm.h
+++ b/sys/arch/i386/include/asm.h
@@ -191,7 +191,7 @@
 #define	__KERNEL_RCSID(_n, _s)	RCSID(_s)
 #endif
 
-#if defined(__ELF__) || defined(__minix)
+#ifdef __ELF__
 #define	WEAK_ALIAS(alias,sym)						\
 	.weak alias;							\
 	alias = sym
diff --git a/sys/arch/i386/include/cdefs.h b/sys/arch/i386/include/cdefs.h
index 6002b786f..49cbedd73 100644
--- a/sys/arch/i386/include/cdefs.h
+++ b/sys/arch/i386/include/cdefs.h
@@ -9,9 +9,4 @@
 
 #define __ALIGNBYTES	(sizeof(int) - 1)
 
-#if defined(__minix)
-#ifndef __ELF__
-#define __LEADING_UNDERSCORE
-#endif
-#endif /* defined(__minix) */
 #endif /* !_I386_CDEFS_H_ */