Index: kernel/generic/src/lib/str.c
===================================================================
--- kernel/generic/src/lib/str.c	(revision 1772e6d8daa54fce8e571f38accabed8f8303558)
+++ kernel/generic/src/lib/str.c	(revision 33c29521d96b892e096419a2fd8beb867e2596f6)
@@ -111,4 +111,5 @@
 #include <debug.h>
 #include <macros.h>
+#include <mm/slab.h>
 
 /** Check the condition if wchar_t is signed */
@@ -567,4 +568,5 @@
 	/* There must be space for a null terminator in the buffer. */
 	ASSERT(size > 0);
+	ASSERT(src != NULL);
 	
 	size_t src_off = 0;