diff --git a/target-mips/translate.c b/target-mips/translate.c
index 42a5753e27719c674e005cdeb76c24af88641716..a8e8ae36339e9a4a1437fd88c2f4d04398e8652b 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -187,10 +187,10 @@ enum {
     OPC_MOVCI    = 0x01 | OPC_SPECIAL,
 
     /* Special */
-    OPC_PMON     = 0x05 | OPC_SPECIAL, /* inofficial */
+    OPC_PMON     = 0x05 | OPC_SPECIAL, /* unofficial */
     OPC_SYSCALL  = 0x0C | OPC_SPECIAL,
     OPC_BREAK    = 0x0D | OPC_SPECIAL,
-    OPC_SPIM     = 0x0E | OPC_SPECIAL, /* inofficial */
+    OPC_SPIM     = 0x0E | OPC_SPECIAL, /* unofficial */
     OPC_SYNC     = 0x0F | OPC_SPECIAL,
 
     OPC_SPECIAL15_RESERVED = 0x15 | OPC_SPECIAL,