diff --git a/slsDetectorSoftware/slsReceiver/receiver_defs.h b/slsDetectorSoftware/slsReceiver/receiver_defs.h
index 0be9ede1f..add44149e 100755
--- a/slsDetectorSoftware/slsReceiver/receiver_defs.h
+++ b/slsDetectorSoftware/slsReceiver/receiver_defs.h
@@ -11,7 +11,7 @@
 #define CREATE_FILES	1
 #define DO_EVERYTHING	2
 
-#define BUF_SIZE        16777216 //16mb
+#define BUF_SIZE        (16*1024*1024) //16mb
 
 //all max frames defined in sls_detector_defs.h. 20000 gotthard, 100000 for short gotthard, 1000 for moench