diff --git a/sys/i386/i386/exception.s b/sys/i386/i386/exception.s
index c03cbce20eb..a8f738a32af 100644
--- a/sys/i386/i386/exception.s
+++ b/sys/i386/i386/exception.s
@@ -234,7 +234,7 @@ IDTVEC(lcall_syscall)
 	pushfl				/* save eflags */
 	popl	8(%esp)			/* shuffle into tf_eflags */
 	pushl	$7			/* sizeof "lcall 7,0" */
-	subl	$4,%esp			/* skip over tf_trapno */
+	pushl	$0			/* tf_trapno */
 	pushal
 	pushl	$0
 	movw	%ds,(%esp)
@@ -263,7 +263,7 @@ IDTVEC(lcall_syscall)
 	SUPERALIGN_TEXT
 IDTVEC(int0x80_syscall)
 	pushl	$2			/* sizeof "int 0x80" */
-	subl	$4,%esp			/* skip over tf_trapno */
+	pushl	$0			/* tf_trapno */
 	pushal
 	pushl	$0
 	movw	%ds,(%esp)