diff --git a/collects/drscheme/private/main.ss b/collects/drscheme/private/main.ss
index 5bf881c65b..1bbf06ea4f 100644
--- a/collects/drscheme/private/main.ss
+++ b/collects/drscheme/private/main.ss
@@ -77,7 +77,7 @@
                                          (number? (car x))
                                          (number? (cdr x))))))
 
-(preferences:set-default 'drscheme:limit-memory (* 1024 1024 128)
+(preferences:set-default 'drscheme:memory-limit (* 1024 1024 128)
                          (λ (x) (or (boolean? x)
                                     (integer? x)
                                     (x . >= . (* 1024 1024 100)))))
diff --git a/collects/drscheme/private/rep.ss b/collects/drscheme/private/rep.ss
index 90af1ebabd..bbe54ee30f 100644
--- a/collects/drscheme/private/rep.ss
+++ b/collects/drscheme/private/rep.ss
@@ -871,7 +871,7 @@ TODO
              (memory-killed-thread #f)
              (user-custodian #f)
              (custodian-limit (and (custodian-memory-accounting-available?)
-                                   (preferences:get 'drscheme:limit-memory)))
+                                   (preferences:get 'drscheme:memory-limit)))
              (user-eventspace-box (make-weak-box #f))
              (user-namespace-box (make-weak-box #f))
              (user-eventspace-main-thread #f)
@@ -957,7 +957,7 @@ TODO
                      )])
           (when (equal? ans 3)
             (set-custodian-limit new-limit)
-            (preferences:set 'drscheme:limit-memory new-limit))
+            (preferences:set 'drscheme:memory-limit new-limit))
           (set-insertion-point (last-position))
           (insert-warning "\n[Interactions disabled]")))
       
diff --git a/collects/drscheme/private/unit.ss b/collects/drscheme/private/unit.ss
index d264d194e3..0812e01ecc 100644
--- a/collects/drscheme/private/unit.ss
+++ b/collects/drscheme/private/unit.ss
@@ -3130,10 +3130,10 @@ module browser threading seems wrong.
                         (when num
                           (cond
                             [(eq? num #t)
-                             (preferences:set 'drscheme:limit-memory #f)
+                             (preferences:set 'drscheme:memory-limit #f)
                              (send interactions-text set-custodian-limit #f)]
                             [else
-                             (preferences:set 'drscheme:limit-memory 
+                             (preferences:set 'drscheme:memory-limit 
                                               (* 1024 1024 num))
                              (send interactions-text set-custodian-limit
                                    (* 1024 1024 num))]))))]))