diff --git a/layer3.c b/layer3.c
index e635576..30e1eb5 100644
--- a/layer3.c
+++ b/layer3.c
@@ -948,8 +948,7 @@ static int III_dequantize_sample(struct mpstr *mp, real xr[SBLIMIT][SSLIMIT],int
 	/* 
      * zero part
      */
-    for(i=(&xr[SBLIMIT][0]-xrpnt)>>1;i;i--) {
-      *xrpnt++ = 0.0;
+    while (xrpnt <= &xr[SBLIMIT-1][SSLIMIT-1]) {
       *xrpnt++ = 0.0;
     }