Index: kernel/generic/src/lib/str.c
===================================================================
--- kernel/generic/src/lib/str.c	(revision 181a746c0eb2d625af267727d01796f91915bccd)
+++ kernel/generic/src/lib/str.c	(revision 5b382774cede49c01f80b52156d1d7532b7dc182)
@@ -111,4 +111,5 @@
 #include <debug.h>
 #include <macros.h>
+#include <mm/slab.h>
 
 /** Check the condition if wchar_t is signed */