diff --git a/src/streamfile.h b/src/streamfile.h
index 5ad1f3a6..bc269331 100644
--- a/src/streamfile.h
+++ b/src/streamfile.h
@@ -32,7 +32,7 @@
 #define fseeko fseek
 #endif
 
-#define STREAMFILE_DEFAULT_BUFFER_SIZE 0x400
+#define STREAMFILE_DEFAULT_BUFFER_SIZE 0x8000
 
 #ifndef DIR_SEPARATOR
 #if defined (_WIN32) || defined (WIN32)
diff --git a/test/test.c b/test/test.c
index d4180192..9221cb29 100644
--- a/test/test.c
+++ b/test/test.c
@@ -18,7 +18,7 @@
 #define VERSION ""
 #endif
 
-#define BUFSIZE 4000
+#define BUFSIZE 0x8000
 
 extern char * optarg;
 extern int optind, opterr, optopt;