diff --git a/library/dialect/swi/fli/swi.c b/library/dialect/swi/fli/swi.c
index 498415c98..d0268df46 100755
--- a/library/dialect/swi/fli/swi.c
+++ b/library/dialect/swi/fli/swi.c
@@ -9,6 +9,8 @@
 
 */
 
+#define PL_KERNEL 1
+
 //=== includes ===============================================================
 #include	<stdlib.h>
 #include	<string.h>
diff --git a/packages/PLStream/pl-yap.c b/packages/PLStream/pl-yap.c
index ad608fdc5..34550abc0 100755
--- a/packages/PLStream/pl-yap.c
+++ b/packages/PLStream/pl-yap.c
@@ -1,6 +1,8 @@
 
 /* YAP support for some low-level SWI stuff */
 
+#define PL_KERNEL 1
+
 #include <stdio.h>
 #include "Yap.h"
 #include "Yatom.h"