diff --git a/kernel/entry.asm b/kernel/entry.asm
index 47316d6..d6a944b 100644
--- a/kernel/entry.asm
+++ b/kernel/entry.asm
@@ -611,6 +611,8 @@ CritErr05:
                 mov     bp,sp
                 push    si
                 push    di
+                Protect386Registers
+
                 ;
                 ; Get parameters
                 ;
@@ -715,6 +717,8 @@ CritErr30:
 
 CritErrExit:
                 xor     ah,ah                   ; clear out top for return
+
+                Restore386Registers
                 pop     di
                 pop     si
                 pop     bp