diff --git a/include/asm-mips/mipsregs.h b/include/asm-mips/mipsregs.h
index 6776688..1f318d7 100644
--- a/include/asm-mips/mipsregs.h
+++ b/include/asm-mips/mipsregs.h
@@ -470,6 +470,7 @@
 
 /* Bits specific to the VR41xx.  */
 #define VR41_CONF_CS		(_ULCAST_(1) << 12)
+#define VR41_CONF_P4K		(_ULCAST_(1) << 13)
 #define VR41_CONF_BP		(_ULCAST_(1) << 16)
 #define VR41_CONF_M16		(_ULCAST_(1) << 20)
 #define VR41_CONF_AD		(_ULCAST_(1) << 23)