diff --git a/modules/database/src/std/rec/compressRecord.dbd.pod b/modules/database/src/std/rec/compressRecord.dbd.pod
index 9323a35cb..20c52f496 100644
--- a/modules/database/src/std/rec/compressRecord.dbd.pod
+++ b/modules/database/src/std/rec/compressRecord.dbd.pod
@@ -175,6 +175,11 @@ of all four records will be calculated and placed into the VAL field.
 If PBUF is set to YES, then after each process the average of the first several
 elements will be calculated.
 
+Note that PBUF has no impact on the C<<< Average >>> method. If one wishes to have a
+rolling average computed, then the best way to achieve that is with two compress
+records: a C<<< Circular buffer >>> which is linked to an C<<< N to 1 Average >>>
+record with PBUF set to YES.
+
 The compression record keeps NSAM data samples.
 
 The field N determines the number of elements to compress into each result.