diff --git a/channels/chan_vpb.c b/channels/chan_vpb.c
index ce3005fcba..62c6fa89f0 100755
--- a/channels/chan_vpb.c
+++ b/channels/chan_vpb.c
@@ -39,7 +39,7 @@
 #define DEFAULT_GAIN 0
 #define DEFAULT_ECHO_CANCEL 1
   
-#define VPB_SAMPLES 240 
+#define VPB_SAMPLES 160 
 #define VPB_MAX_BUF VPB_SAMPLES*4 + AST_FRIENDLY_OFFSET
 
 #define VPB_NULL_EVENT 200