diff --git a/windows/security_windows.go b/windows/security_windows.go
index f1ec5dc4..4f17a333 100644
--- a/windows/security_windows.go
+++ b/windows/security_windows.go
@@ -296,6 +296,7 @@ const (
 	TOKEN_ADJUST_PRIVILEGES
 	TOKEN_ADJUST_GROUPS
 	TOKEN_ADJUST_DEFAULT
+	TOKEN_ADJUST_SESSIONID
 
 	TOKEN_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED |
 		TOKEN_ASSIGN_PRIMARY |
@@ -305,7 +306,8 @@ const (
 		TOKEN_QUERY_SOURCE |
 		TOKEN_ADJUST_PRIVILEGES |
 		TOKEN_ADJUST_GROUPS |
-		TOKEN_ADJUST_DEFAULT
+		TOKEN_ADJUST_DEFAULT |
+		TOKEN_ADJUST_SESSIONID
 	TOKEN_READ  = STANDARD_RIGHTS_READ | TOKEN_QUERY
 	TOKEN_WRITE = STANDARD_RIGHTS_WRITE |
 		TOKEN_ADJUST_PRIVILEGES |
diff --git a/windows/syscall_windows_test.go b/windows/syscall_windows_test.go
index 9c7133cc..0e27464e 100644
--- a/windows/syscall_windows_test.go
+++ b/windows/syscall_windows_test.go
@@ -105,3 +105,9 @@ func ExampleLoadLibrary() {
 	build := uint16(r >> 16)
 	print("windows version ", major, ".", minor, " (Build ", build, ")\n")
 }
+
+func TestTOKEN_ALL_ACCESS(t *testing.T) {
+	if windows.TOKEN_ALL_ACCESS != 0xF01FF {
+		t.Errorf("TOKEN_ALL_ACCESS = %x, want 0xF01FF", windows.TOKEN_ALL_ACCESS)
+	}
+}