diff --git a/src/arch/i386.h b/src/arch/i386.h
index c5ba15e..ec918f2 100644
--- a/src/arch/i386.h
+++ b/src/arch/i386.h
@@ -15,6 +15,7 @@
 
 
 
+#include <System.h>
 #include <string.h>
 #include <errno.h>
 
diff --git a/src/arch/i386.ins b/src/arch/i386.ins
index 1b9090f..16d810e 100644
--- a/src/arch/i386.ins
+++ b/src/arch/i386.ins
@@ -318,6 +318,8 @@
 /* CDQ		0x99		1					*/
 { "cdq",	0x99,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
 #endif
+/* DAS		0x2f		1					*/
+{ "das",	0x2f,		OP1F, AOT_NONE,   AOT_NONE,  AOT_NONE	},
 /* DEC		0x48 +rd	1					*/
 { "dec",	0x48,		OP1F, OP_AX,      AOT_NONE,  AOT_NONE	},
 { "dec",	0x49,		OP1F, OP_CX,      AOT_NONE,  AOT_NONE	},
diff --git a/test/i386.S b/test/i386.S
index 7ebaf4c..440b872 100644
--- a/test/i386.S
+++ b/test/i386.S
@@ -82,6 +82,7 @@
 	cmc					/* f5			*/
 	cpuid					/* 0f a2		*/
 	cdq					/* 0x99			*/
+	das
 	/* DEC */
 	dec	%eax				/* 48			*/
 	dec	%ecx				/* 49			*/