diff --git a/src/kits/support/BlockCache.cpp b/src/kits/support/BlockCache.cpp
index e535ce94ee..126b9455f1 100644
--- a/src/kits/support/BlockCache.cpp
+++ b/src/kits/support/BlockCache.cpp
@@ -147,3 +147,6 @@ BBlockCache::Save(void *pointer, size_t blockSize)
 	}
 	fLocker.Unlock();
 }
+
+void BBlockCache::_ReservedBlockCache1() {}
+void BBlockCache::_ReservedBlockCache2() {}