1 files changed, 3 insertions, 2 deletions

diff --git a/src/archivebase.h b/src/archivebase.h
index c871bb5..18591f0 100644
--- a/src/archivebase.h
+++ b/src/archivebase.h
@@ -9,6 +9,7 @@
 #define BU_ARCHIVE_BASE_H
 
 #include <stdint.h>
+#include <unistd.h>
 
 namespace Bu
 {
@@ -19,8 +20,8 @@ namespace Bu
                 virtual ~ArchiveBase();
 
                 virtual void close()=0;
-                virtual void write( const void *pData, int32_t iLength )=0;
-                virtual void read( void *pData, int32_t iLength )=0;
+                virtual void write( const void *pData, size_t iLength )=0;
+                virtual void read( void *pData, size_t iLength )=0;
                 virtual bool isLoading()=0;
         };