diff --git a/core/src/main/resources/hudson/Messages.properties b/core/src/main/resources/hudson/Messages.properties
index 0a6173e0c3..14a920f485 100644
--- a/core/src/main/resources/hudson/Messages.properties
+++ b/core/src/main/resources/hudson/Messages.properties
@@ -4,3 +4,6 @@ Util.hour  ={0} {0,choice,0#hours|1#hour|1<hours}
 Util.day   ={0} {0,choice,0#days|1#day|1<days}
 Util.month ={0} {0,choice,0#months|1#month|1<months}
 Util.year  ={0} {0,choice,0#years|1#year|1<years}
+
+# ideally it should be "{0} ago" but this saves more space
+Util.pastTime={0}
\ No newline at end of file
diff --git a/core/src/main/resources/hudson/Messages_ja.properties b/core/src/main/resources/hudson/Messages_ja.properties
index a3d7b1b31e..a7aae19915 100644
--- a/core/src/main/resources/hudson/Messages_ja.properties
+++ b/core/src/main/resources/hudson/Messages_ja.properties
@@ -4,3 +4,5 @@ Util.hour  ={0}\u6642\u9593
 Util.day   ={0}\u65e5
 Util.month ={0}\u6708
 Util.year  ={0}\u5e74
+
+Util.pastTime={0}\u524d
\ No newline at end of file