diff --git a/ports/ChangeLog.mips b/ports/ChangeLog.mips
index c958f29285..257a68c2ef 100644
--- a/ports/ChangeLog.mips
+++ b/ports/ChangeLog.mips
@@ -1,3 +1,7 @@
+2013-09-23  Steve Ellcey  <sellcey@mips.com>
+
+	* sysdeps/mips/fpu_control.h (_FPU_RC_MASK): New.
+
 2013-09-23  Steve Ellcey  <sellcey@mips.com>
 
 	* sysdeps/mips/fpu_control.h (comments): Add capitalization and
diff --git a/ports/sysdeps/mips/fpu_control.h b/ports/sysdeps/mips/fpu_control.h
index a318ade9bc..ee774153f2 100644
--- a/ports/sysdeps/mips/fpu_control.h
+++ b/ports/sysdeps/mips/fpu_control.h
@@ -90,6 +90,8 @@ extern fpu_control_t __fpu_control;
 #define _FPU_RC_ZERO    0x1
 #define _FPU_RC_UP      0x2
 #define _FPU_RC_DOWN    0x3
+/* Mask for rounding control.  */
+#define _FPU_RC_MASK	0x3
 
 #define _FPU_RESERVED 0xfe840000  /* Reserved bits in cw, incl NAN2008.  */