diff --git a/eth/downloader/queue.go b/eth/downloader/queue.go
index c254c9eeef..cd6da0da64 100644
--- a/eth/downloader/queue.go
+++ b/eth/downloader/queue.go
@@ -42,10 +42,10 @@ const (
 )
 
 var (
-	blockCacheMaxItems            = 32768                                 // Maximum number of blocks to cache before throttling the download
-	blockCacheInitialItems        = blockCacheMemory / (10 * 1024 * 1024) // Initial number of blocks to start fetching, before we know the sizes of the blocks
-	blockCacheSizeWeight          = 0.1                                   // Multiplier to approximate the average block size based on past ones
-	blockCacheMemory       uint64 = 2 * 1024 * 1024 * 1024                // Maximum amount of memory to use for block caching
+	blockCacheMaxItems            = 32768                                      // Maximum number of blocks to cache before throttling the download
+	blockCacheInitialItems        = int(blockCacheMemory) / (10 * 1024 * 1024) // Initial number of blocks to start fetching, before we know the sizes of the blocks
+	blockCacheSizeWeight          = 0.1                                        // Multiplier to approximate the average block size based on past ones
+	blockCacheMemory       uint64 = 2 * 1024 * 1024 * 1024                     // Maximum amount of memory to use for block caching
 )
 
 var (