diff --git a/ports/ChangeLog.mips b/ports/ChangeLog.mips
index 4e45ae737c..d4978abd96 100644
--- a/ports/ChangeLog.mips
+++ b/ports/ChangeLog.mips
@@ -1,3 +1,11 @@
+2012-08-01  Steve Ellcey  <sellcey@mips.com>
+
+	* sysdeps/mips/sys/asm.h [_MIPS_ISA != _MIPS_ISA_MIPS4 &&
+	_MIPS_ISA != _MIPS_ISA_MIPS5 && _MIPS_ISA != _MIPS_ISA_MIPS32 &&
+	_MIPS_ISA != _MIPS_ISA_MIPS64] (PREF): Define as function-like
+	macro.
+	(PREFX): Likewise.
+
 2012-07-31  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/unix/sysv/linux/mips/fcntl.c: Remove.
diff --git a/ports/sysdeps/mips/sys/asm.h b/ports/sysdeps/mips/sys/asm.h
index 347d738f70..0f5edf9243 100644
--- a/ports/sysdeps/mips/sys/asm.h
+++ b/ports/sysdeps/mips/sys/asm.h
@@ -233,8 +233,8 @@ symbol		=	value
 # define PREFX(hint,addr)                                \
 		prefx	hint,addr
 #else
-# define PREF
-# define PREFX
+# define PREF(hint,addr)
+# define PREFX(hint,addr)
 #endif
 
 /*