diff --git a/src/system/kernel/slab/MemoryManager.h b/src/system/kernel/slab/MemoryManager.h
index 48e593db6e..a8a6040da1 100644
--- a/src/system/kernel/slab/MemoryManager.h
+++ b/src/system/kernel/slab/MemoryManager.h
@@ -31,7 +31,6 @@ struct VMArea;
 	// bounds.
 
 #define SLAB_META_CHUNKS_PER_AREA	(SLAB_AREA_SIZE / SLAB_CHUNK_SIZE_LARGE)
-#define SLAB_SMALL_CHUNKS_PER_AREA	(SLAB_AREA_SIZE / SLAB_CHUNK_SIZE_SMALL)
 #define SLAB_SMALL_CHUNKS_PER_META_CHUNK	\
 	(SLAB_CHUNK_SIZE_LARGE / SLAB_CHUNK_SIZE_SMALL)