diff --git a/ChangeLog b/ChangeLog
index 4bea87648..9e2dca45b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2008-02-08  Paolo Bonzini  <bonzini@gnu.org>
+
+	* lightning/i386/asm-i386.h: Don't define _VOID, reported
+	by Reini Urban.
+
 2008-02-03  Paolo Bonzini  <bonzini@gnu.org>
 
 	* build-aux/lightning.m4: Add --with-lightning-prefix option, suggested
diff --git a/lightning/i386/asm-i386.h b/lightning/i386/asm-i386.h
index 87b84a9b3..728ae3673 100644
--- a/lightning/i386/asm-i386.h
+++ b/lightning/i386/asm-i386.h
@@ -242,11 +242,11 @@ typedef _uc		jit_insn;
 
 /* --- REX prefixes -------------------------------------------------------- */
 
-#define _VOID()			((void)0)
+
 #define _BIT(X)			(!!(X))
 #define _d64(W,R,X,B)		(_jit_B(0x40|(W)<<3|(R)<<2|(X)<<1|(B)))
 
-#define __REXwrxb(L,W,R,X,B)	((W|R|X|B) || (L) ? _d64(W,R,X,B) : _VOID())
+#define __REXwrxb(L,W,R,X,B)	((W|R|X|B) || (L) ? _d64(W,R,X,B) : ((void)0))
 #define __REXwrx_(L,W,R,X,MR)	(__REXwrxb(L,W,R,X,_BIT(_rIP(MR)?0:_rXP(MR))))
 #define __REXw_x_(L,W,R,X,MR)	(__REXwrx_(L,W,_BIT(_rXP(R)),X,MR))
 #define __REX_reg(RR)		(__REXwrxb(0,0,0,00,_BIT(_rXP(RR))))