diff --git a/src/system/kernel/cache/block_cache.cpp b/src/system/kernel/cache/block_cache.cpp
index d989ce812c..d464af6abc 100644
--- a/src/system/kernel/cache/block_cache.cpp
+++ b/src/system/kernel/cache/block_cache.cpp
@@ -215,6 +215,9 @@ block_cache::GetRange(void *address)
 void
 block_cache::Free(void *address)
 {
+	if (address == NULL)
+		return;
+
 	block_range *range = GetRange(address);
 	ASSERT(range != NULL);
 	range->Free(this, address);