diff --git a/linker/linker_block_allocator.h b/linker/linker_block_allocator.h
index 8ae4094..32656c7 100644
--- a/linker/linker_block_allocator.h
+++ b/linker/linker_block_allocator.h
@@ -33,6 +33,9 @@
 
 #include <android-base/macros.h>
 
+static constexpr size_t kBlockSizeAlign = sizeof(void*);
+static constexpr size_t kBlockSizeMin = sizeof(void*) * 2;
+
 struct LinkerBlockAllocatorPage;
 
 /*