diff --git a/src/add-ons/kernel/file_systems/bfs/Debug.h b/src/add-ons/kernel/file_systems/bfs/Debug.h
index b04c497671..ad35251092 100644
--- a/src/add-ons/kernel/file_systems/bfs/Debug.h
+++ b/src/add-ons/kernel/file_systems/bfs/Debug.h
@@ -8,6 +8,11 @@
 
 
 #include <KernelExport.h>
+
+#ifdef DEBUG
+#	include <string.h>
+#endif
+
 #ifdef USER
 #	include <stdio.h>
 #	define __out printf