diff --git a/src/system/kernel/slab/allocator.cpp b/src/system/kernel/slab/allocator.cpp
index cdcbc62546..54d2fe4cd6 100644
--- a/src/system/kernel/slab/allocator.cpp
+++ b/src/system/kernel/slab/allocator.cpp
@@ -23,6 +23,9 @@
 #include "MemoryManager.h"
 
 
+#if USE_SLAB_ALLOCATOR_FOR_MALLOC
+
+
 //#define TEST_ALL_CACHES_DURING_BOOT
 
 static const size_t kBlockSizes[] = {
@@ -202,9 +205,6 @@ block_allocator_init_rest()
 // #pragma mark - public API
 
 
-#if USE_SLAB_ALLOCATOR_FOR_MALLOC
-
-
 void*
 memalign(size_t alignment, size_t size)
 {
@@ -295,6 +295,29 @@ realloc(void* address, size_t newSize)
 }
 
 
+#else
+
+
+void*
+block_alloc_early(size_t size)
+{
+	panic("block allocator not enabled!");
+	return NULL;
+}
+
+
+void
+block_allocator_init_boot()
+{
+}
+
+
+void
+block_allocator_init_rest()
+{
+}
+
+
 #endif	// USE_SLAB_ALLOCATOR_FOR_MALLOC