diff --git a/target/mips/translate.c b/target/mips/translate.c
index d2053d69d7..848b0ef9b5 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -23978,6 +23978,12 @@ static void decode_opc_special(CPUMIPSState *env, DisasContext *ctx)
     }
 }
 
+
+/* MXU accumulate add/subtract 1-bit pattern 'aptn1' */
+#define MXU_APTN1_A    0
+#define MXU_APTN1_S    1
+
+
 /*
  *
  * Decode MXU pool00