diff --git a/browser/components/privatebrowsing/src/nsPrivateBrowsingService.js b/browser/components/privatebrowsing/src/nsPrivateBrowsingService.js
index f447b2eaf15..3796b857d00 100644
--- a/browser/components/privatebrowsing/src/nsPrivateBrowsingService.js
+++ b/browser/components/privatebrowsing/src/nsPrivateBrowsingService.js
@@ -369,7 +369,12 @@ PrivateBrowsingService.prototype = {
               getService(Ci.nsICacheService)) {
       // NOTE: there is no way to clear just that domain, so we clear out
       //       everything)
-      cs.evictEntries(Ci.nsICache.STORE_ANYWHERE);
+      try {
+        cs.evictEntries(Ci.nsICache.STORE_ANYWHERE);
+      } catch (ex) {
+        Cu.reportError("Exception thrown while clearing the cache: " +
+          ex.toString());
+      }
     }
 
     // Cookies