diff --git a/collects/typed-racket/optimizer/logging.rkt b/collects/typed-racket/optimizer/logging.rkt
index ee614ee2c9..211ae712d8 100644
--- a/collects/typed-racket/optimizer/logging.rkt
+++ b/collects/typed-racket/optimizer/logging.rkt
@@ -24,7 +24,7 @@
 (define (anyone-listening?) (log-level? TR-logger TR-logging-level))
 
 ;; msg is for consumption by the DrRacket tool
-(struct log-entry (kind msg stx located-stx pos provenance) #:prefab)
+(struct log-entry (kind msg stx located-stx pos) #:prefab)
 ;; for optimizations only (not missed optimizations, those are below)
 (struct opt-log-entry log-entry () #:prefab)
 
@@ -32,8 +32,7 @@
 (define (log-optimization kind msg stx)
   (when (anyone-listening?)
     (emit-log-message
-     (opt-log-entry kind msg stx (locate-stx stx) (syntax-position stx)
-                    'typed-racket))))
+     (opt-log-entry kind msg stx (locate-stx stx) (syntax-position stx)))))
 
 ;;--------------------------------------------------------------------
 
@@ -62,7 +61,6 @@
       (emit-log-message
        (missed-opt-log-entry kind msg
                              stx (locate-stx stx) (syntax-position stx)
-                             'typed-racket
                              irritants '() 1)))))
 
 
@@ -78,8 +76,7 @@
   (when (anyone-listening?)
     (emit-log-message
      ;; no actual message, since it's not meant for user consumption
-     (info-log-entry kind "" stx (locate-stx stx) (syntax-position stx)
-                     'typed-racket))))
+     (info-log-entry kind "" stx (locate-stx stx) (syntax-position stx)))))
 
 ;;--------------------------------------------------------------------
 
diff --git a/collects/typed-racket/optimizer/tool/causality-merging.rkt b/collects/typed-racket/optimizer/tool/causality-merging.rkt
index 3d0c6df09c..caf6b2f7aa 100644
--- a/collects/typed-racket/optimizer/tool/causality-merging.rkt
+++ b/collects/typed-racket/optimizer/tool/causality-merging.rkt
@@ -38,7 +38,6 @@
    (log-entry-stx         parent) ; we report the outermost one
    (log-entry-located-stx parent)
    (log-entry-pos         parent)
-   (log-entry-provenance  parent)
 
    (remove-duplicates
     (append (remove (log-entry-stx child)
diff --git a/collects/typed-racket/optimizer/tool/inlining.rkt b/collects/typed-racket/optimizer/tool/inlining.rkt
index e7e0cef1bf..e52467e07c 100644
--- a/collects/typed-racket/optimizer/tool/inlining.rkt
+++ b/collects/typed-racket/optimizer/tool/inlining.rkt
@@ -63,7 +63,7 @@
     ;; prune this entry from the logs, but return what we produced so far
     (define (prune) (escape produced-entries))
     (match (car log) ; events are grouped, first element is representative
-      [(log-entry kind msg stx located-stx pos provenance)
+      [(log-entry kind msg stx located-stx pos)
 
        ;; #f if no profiling info is available for this function
        ;; takes in either a single pos number or a pair of numbers (line col)
@@ -190,7 +190,7 @@
                                (format-aggregation-string pruned-log)
                                (if msg (format "~a\n" msg) "")
                                recommendation)
-                       provenance
+                       'inlining
                        badness
                        '())) ; no irritants to highlight
                 start end
@@ -201,7 +201,7 @@
                        located-stx
                        (format "Inlining ~a"
                                (format-aggregation-string pruned-log))
-                       provenance))
+                       'inlining))
                 start end
                 0)))
 
diff --git a/collects/typed-racket/optimizer/tool/instrumentation.rkt b/collects/typed-racket/optimizer/tool/instrumentation.rkt
index 1e107338d2..b87313c852 100644
--- a/collects/typed-racket/optimizer/tool/instrumentation.rkt
+++ b/collects/typed-racket/optimizer/tool/instrumentation.rkt
@@ -85,7 +85,6 @@
   (inliner-log-entry kind kind
                      forged-stx forged-stx
                      (syntax-position forged-stx)
-                     'mzc
                      evt))
 
 (define inlining-event-regexp
diff --git a/collects/typed-racket/optimizer/tool/report.rkt b/collects/typed-racket/optimizer/tool/report.rkt
index f71fb4e59b..3c84259e4a 100644
--- a/collects/typed-racket/optimizer/tool/report.rkt
+++ b/collects/typed-racket/optimizer/tool/report.rkt
@@ -25,9 +25,10 @@
 ;; Returns a report-entry or #f, which means prune.
 (define (log-entry->report-entry l)
   (match l
-    [(log-entry kind msg stx located-stx (? number? pos) provenance)
+    [(log-entry kind msg stx located-stx (? number? pos))
      (define start     (sub1 pos))
      (define end       (+ start (syntax-span stx)))
+     (define provenance 'typed-racket)
      ;; When we first create report entries, they have a single sub.
      (report-entry (list (if (opt-log-entry? l)
                              (opt-report-entry located-stx msg provenance)
@@ -76,9 +77,9 @@
               (/ (node-self (car profile-entry)) total-time)
               1))
         (match l
-          [(missed-opt-log-entry kind msg stx located-stx pos provenance
+          [(missed-opt-log-entry kind msg stx located-stx pos
                                  irritants merged-irritants badness)
-           (missed-opt-log-entry kind msg stx located-stx pos provenance
+           (missed-opt-log-entry kind msg stx located-stx pos
                                  irritants merged-irritants
                                  ;; uses ceiling to never go down to 0
                                  ;; both badness and badness-multiplier are non-0
diff --git a/collects/typed-racket/optimizer/tool/tool.rkt b/collects/typed-racket/optimizer/tool/tool.rkt
index 728b2a091f..9285e6b464 100644
--- a/collects/typed-racket/optimizer/tool/tool.rkt
+++ b/collects/typed-racket/optimizer/tool/tool.rkt
@@ -20,7 +20,7 @@
      ,(match-lambda [(sub-report-entry s m 'typed-racket) #t]
                     [_ #f]))
     ("Report inlining optimizations?" .
-     ,(match-lambda [(sub-report-entry s m 'mzc) #t]
+     ,(match-lambda [(sub-report-entry s m 'inlining) #t]
                     [_ #f]))
     ("Report hidden costs?" .
      ,(match-lambda [(sub-report-entry s m 'hidden-cost) #t]