diff --git a/dead-man-qry.bash b/dead-man-qry.bash
index 4fa36b2..53baf8e 100755
--- a/dead-man-qry.bash
+++ b/dead-man-qry.bash
@@ -4,7 +4,8 @@
 # MAILTO=jody@kaplon.us
 # 0,30 * * * * ~/dead-man-qry.bash
 
-NUMHRS=6
+# Build in a buffer of 15min to avoid false positives.
+NUMHRS=6.25
 
 # set now variable
 NOW=$(date -u +"%Y-%m-%d %H:%M:%S")