diff --git a/resources/celerity/map.php b/resources/celerity/map.php
index 112c75919b..3ffa4bb058 100644
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -78,7 +78,7 @@ return array(
     'rsrc/css/application/feed/feed.css' => 'ecd4ec57',
     'rsrc/css/application/files/global-drag-and-drop.css' => 'b556a948',
     'rsrc/css/application/flag/flag.css' => 'bba8f811',
-    'rsrc/css/application/harbormaster/harbormaster.css' => '2999ccaa',
+    'rsrc/css/application/harbormaster/harbormaster.css' => 'cd73d427',
     'rsrc/css/application/herald/herald-test.css' => 'a52e323e',
     'rsrc/css/application/herald/herald.css' => 'cd8d0134',
     'rsrc/css/application/maniphest/report.css' => '9b9580b7',
@@ -495,7 +495,7 @@ return array(
     'rsrc/js/core/behavior-keyboard-pager.js' => 'a8da01f0',
     'rsrc/js/core/behavior-keyboard-shortcuts.js' => '01fca1f0',
     'rsrc/js/core/behavior-lightbox-attachments.js' => 'e31fad01',
-    'rsrc/js/core/behavior-line-linker.js' => 'c479ac01',
+    'rsrc/js/core/behavior-line-linker.js' => 'a9b946f8',
     'rsrc/js/core/behavior-more.js' => 'a80d0378',
     'rsrc/js/core/behavior-object-selector.js' => '77c1f0b0',
     'rsrc/js/core/behavior-oncopy.js' => '2926fff2',
@@ -579,7 +579,7 @@ return array(
     'font-fontawesome' => 'e838e088',
     'font-lato' => 'c7ccd872',
     'global-drag-and-drop-css' => 'b556a948',
-    'harbormaster-css' => '2999ccaa',
+    'harbormaster-css' => 'cd73d427',
     'herald-css' => 'cd8d0134',
     'herald-rule-editor' => 'dca75c0e',
     'herald-test-css' => 'a52e323e',
@@ -658,7 +658,7 @@ return array(
     'javelin-behavior-phabricator-gesture-example' => '558829c2',
     'javelin-behavior-phabricator-keyboard-pager' => 'a8da01f0',
     'javelin-behavior-phabricator-keyboard-shortcuts' => '01fca1f0',
-    'javelin-behavior-phabricator-line-linker' => 'c479ac01',
+    'javelin-behavior-phabricator-line-linker' => 'a9b946f8',
     'javelin-behavior-phabricator-nav' => '836f966d',
     'javelin-behavior-phabricator-notification-example' => '8ce821c5',
     'javelin-behavior-phabricator-object-selector' => '77c1f0b0',
@@ -1743,6 +1743,12 @@ return array(
       'javelin-uri',
       'phabricator-keyboard-shortcut',
     ),
+    'a9b946f8' => array(
+      'javelin-behavior',
+      'javelin-stratcom',
+      'javelin-dom',
+      'javelin-history',
+    ),
     'a9f88de2' => array(
       'javelin-behavior',
       'javelin-dom',
@@ -1931,12 +1937,6 @@ return array(
       'javelin-stratcom',
       'phabricator-tooltip',
     ),
-    'c479ac01' => array(
-      'javelin-behavior',
-      'javelin-stratcom',
-      'javelin-dom',
-      'javelin-history',
-    ),
     'c587b80f' => array(
       'javelin-install',
     ),
diff --git a/src/applications/harbormaster/controller/HarbormasterBuildLogRenderController.php b/src/applications/harbormaster/controller/HarbormasterBuildLogRenderController.php
index 4fa826b690..cc8da38da9 100644
--- a/src/applications/harbormaster/controller/HarbormasterBuildLogRenderController.php
+++ b/src/applications/harbormaster/controller/HarbormasterBuildLogRenderController.php
@@ -369,8 +369,9 @@ final class HarbormasterBuildLogRenderController
           'a',
           array(
             'href' => $uri.'$'.$display_line,
+            'data-n' => $display_line,
           ),
-          $display_line);
+          '');
 
         $line_cell = phutil_tag('th', array(), $display_line);
         $text_cell = phutil_tag('td', array(), $display_text);
diff --git a/webroot/rsrc/css/application/harbormaster/harbormaster.css b/webroot/rsrc/css/application/harbormaster/harbormaster.css
index 0e8574464d..38a65bf9a0 100644
--- a/webroot/rsrc/css/application/harbormaster/harbormaster.css
+++ b/webroot/rsrc/css/application/harbormaster/harbormaster.css
@@ -48,6 +48,12 @@
   user-select: none;
 }
 
+.harbormaster-log-table > tbody > tr > th a::before {
+  /* Render the line numbers into the document using a pseudo-element so that
+     the text is not copied. */
+  content: attr(data-n);
+}
+
 .harbormaster-log-table > tbody > tr > th a {
   display: block;
   color: {$darkbluetext};
diff --git a/webroot/rsrc/js/core/behavior-line-linker.js b/webroot/rsrc/js/core/behavior-line-linker.js
index ed93e6e11b..a0f99fb3bc 100644
--- a/webroot/rsrc/js/core/behavior-line-linker.js
+++ b/webroot/rsrc/js/core/behavior-line-linker.js
@@ -21,6 +21,16 @@ JX.behavior('phabricator-line-linker', function() {
 
   function getRowNumber(tr) {
     var th = tr.firstChild;
+
+    // If the "<th />" tag contains an "<a />" with "data-n" that we're using
+    // to prevent copy/paste of line numbers, use that.
+    if (th.firstChild) {
+      var line = th.firstChild.getAttribute('data-n');
+      if (line) {
+        return line;
+      }
+    }
+
     return +(th.textContent || th.innerText);
   }