diff --git a/kernel/branches/kolibri_pe/core/syscall.inc b/kernel/branches/kolibri_pe/core/syscall.inc
index 2213e80a86..7e09c0091a 100644
--- a/kernel/branches/kolibri_pe/core/syscall.inc
+++ b/kernel/branches/kolibri_pe/core/syscall.inc
@@ -33,7 +33,7 @@ align 16
 i40:
 	pushad
 	cld
-	and	eax, 0xff
+	movzx	eax, al
 	call	dword [servetable2 + eax * 4]
 	popad
 	iretd
@@ -54,7 +54,7 @@ sysenter_entry:
 	pushad
 	cld
 
-	and	eax, 0xff
+	movzx	eax, al
 	call	dword [servetable2 + eax * 4]
 
 	popad
@@ -87,7 +87,7 @@ syscall_entry:
 	pushad
 	cld
 
-	and	eax, 0xff
+	movzx	eax, al
 	call	dword [servetable2 + eax * 4]
 
 	popad
diff --git a/kernel/trunk/core/syscall.inc b/kernel/trunk/core/syscall.inc
index 2213e80a86..7e09c0091a 100644
--- a/kernel/trunk/core/syscall.inc
+++ b/kernel/trunk/core/syscall.inc
@@ -33,7 +33,7 @@ align 16
 i40:
 	pushad
 	cld
-	and	eax, 0xff
+	movzx	eax, al
 	call	dword [servetable2 + eax * 4]
 	popad
 	iretd
@@ -54,7 +54,7 @@ sysenter_entry:
 	pushad
 	cld
 
-	and	eax, 0xff
+	movzx	eax, al
 	call	dword [servetable2 + eax * 4]
 
 	popad
@@ -87,7 +87,7 @@ syscall_entry:
 	pushad
 	cld
 
-	and	eax, 0xff
+	movzx	eax, al
 	call	dword [servetable2 + eax * 4]
 
 	popad