diff --git a/ph5/utilities/kef2ph5.py b/ph5/utilities/kef2ph5.py
index dce1042e..8bb3a94b 100755
--- a/ph5/utilities/kef2ph5.py
+++ b/ph5/utilities/kef2ph5.py
@@ -82,7 +82,7 @@ def populateTables():
     k.open()
 
     while True:
-        n = k.read(10000)
+        n = k.read(1000000)
         if n == 0:
             err = "Empty kef file."
             break