diff --git a/src/csync_private.h b/src/csync_private.h
index 13dc1d7e85..2ef82ac73a 100644
--- a/src/csync_private.h
+++ b/src/csync_private.h
@@ -56,7 +56,9 @@
 /**
  * Maximum size of a buffer for transfer
  */
-#define MAX_XFER_BUF_SIZE 16348
+#ifndef MAX_XFER_BUF_SIZE
+#define MAX_XFER_BUF_SIZE (16 * 1024)
+#endif
 
 #define CSYNC_STATUS_INIT 1 << 0
 #define CSYNC_STATUS_UPDATE 1 << 1
diff --git a/src/std/c_file.c b/src/std/c_file.c
index 373fb2c831..8e5e567338 100644
--- a/src/std/c_file.c
+++ b/src/std/c_file.c
@@ -51,7 +51,7 @@ int c_copy(const char* src, const char *dst, mode_t mode) {
   int rc = -1;
   ssize_t bread, bwritten;
   struct stat sb;
-  char buf[MAX_XFER_BUF_SIZE];
+  char buf[BUFFER_SIZE];
 
   if (c_streq(src, dst)) {
     return -1;
@@ -88,7 +88,7 @@ int c_copy(const char* src, const char *dst, mode_t mode) {
   }
 
   for (;;) {
-    bread = read(srcfd, buf, MAX_XFER_BUF_SIZE);
+    bread = read(srcfd, buf, BUFFER_SIZE);
     if (bread == 0) {
       /* done */
       break;
diff --git a/src/std/c_file.h b/src/std/c_file.h
index 25f2d17b88..76d1269ec2 100644
--- a/src/std/c_file.h
+++ b/src/std/c_file.h
@@ -36,8 +36,8 @@
 
 #include <sys/types.h>
 
-#ifndef MAX_XFER_BUF_SIZE
-#define MAX_XFER_BUF_SIZE 16348
+#ifndef BUFFER_SIZE
+#define BUFFER_SIZE (16 * 1024)
 #endif
 
 /**