diff --git a/arch/Mips/MipsMapping.c b/arch/Mips/MipsMapping.c
index 38ab71a2..44989f2e 100644
--- a/arch/Mips/MipsMapping.c
+++ b/arch/Mips/MipsMapping.c
@@ -9218,12 +9218,6 @@ static insn_map alias_insns[] = {
 		(unsigned short)-2, MIPS_INS_NOP,
 #ifndef CAPSTONE_DIET
 		{ 0 }, { 0 }, { 0 }, 0, 0
-#endif
-	},
-	{
-		Mips_SUBu, MIPS_INS_NEGU,
-#ifndef CAPSTONE_DIET
-		{ 0 }, { 0 }, { MIPS_GRP_STDENC, 0 }, 0, 0
 #endif
 	},
 };