diff --git a/src/arch/i386.ins b/src/arch/i386.ins
index d059dde..d4878c2 100644
--- a/src/arch/i386.ins
+++ b/src/arch/i386.ins
@@ -586,6 +586,16 @@
 { "fnop",	0xd9d0,		OP2F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
 /* FWAIT	0x9b		1					*/
 { "fwait",	0x9b,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
+/* NEG		0xf6 /3		1     r/m8				*/
+{ "negb",	0xf6,		OP1F, OP_RM8_D0+3,AOT_NONE,  AOT_NONE	},
+{ "negb",	0xf6,		OP1F, OP_RM8_D8+3,AOT_NONE,  AOT_NONE	},
+{ "negb",	0xf6,		OP1F, OP_RM8_DW+3,AOT_NONE,  AOT_NONE	},
+{ "neg",	0xf6,		OP1F, OP_RM8_R8+3,AOT_NONE,  AOT_NONE	},
+/* NEG		0xf7 /3		1     r/mW				*/
+{ "neg",	0xf7,		OP1F, OP_RMW_D0+3,AOT_NONE,  AOT_NONE	},
+{ "neg",	0xf7,		OP1F, OP_RMW_D8+3,AOT_NONE,  AOT_NONE	},
+{ "neg",	0xf7,		OP1F, OP_RMW_DW+3,AOT_NONE,  AOT_NONE	},
+{ "neg",	0xf7,		OP1F, OP_RMW_RW+3,AOT_NONE,  AOT_NONE	},
 /* NOP		0x90		1					*/
 { "nop",	0x90,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
 /* NOT		0xf6 /2		1     r/m8				*/
diff --git a/test/i386.S b/test/i386.S
index b6cf5d3..53d76ad 100644
--- a/test/i386.S
+++ b/test/i386.S
@@ -241,6 +241,14 @@
 	fninit
 	fwait
 	nop					/* 90			*/
+	negb	[%eax]
+	negb	[%eax + $0x42]
+	negb	[%eax + $0x11223344]
+	neg	%ch
+	neg	[%eax]
+	neg	[%eax + $0x42]
+	neg	[%eax + $0x11223344]
+	neg	%eax
 	notb	[%eax]
 	notb	[%eax + $0x42]
 	notb	[%eax + $0x11223344]