diff --git a/qemu/target/mips/translate.c b/qemu/target/mips/translate.c
index d7ad3369..bca3fb32 100644
--- a/qemu/target/mips/translate.c
+++ b/qemu/target/mips/translate.c
@@ -24127,6 +24127,10 @@ 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