diff --git a/src/kernel/core/heap.c b/src/kernel/core/heap.c
index ab21a7aca8..fde8d9e2e1 100644
--- a/src/kernel/core/heap.c
+++ b/src/kernel/core/heap.c
@@ -29,7 +29,10 @@
 /* check if freed pointers are already freed */  
 #define PARANOID_KFREE 1
 /* use a back and front wall around each allocation */
-#define USE_WALL 1
+/* does currently not work correctly, because the VM malloc()s a PAGE_SIZE and
+ * later checks if the returned address is aligned...
+ */
+#define USE_WALL 0
 
 
 // heap stuff