diff --git a/core/lib/Drupal/Core/Theme/ThemeInitialization.php b/core/lib/Drupal/Core/Theme/ThemeInitialization.php
index bf58584..0641701 100644
--- a/core/lib/Drupal/Core/Theme/ThemeInitialization.php
+++ b/core/lib/Drupal/Core/Theme/ThemeInitialization.php
@@ -174,11 +174,21 @@ public function getActiveTheme(Extension $theme, array $base_themes = []) {
     // modules.
     $values['libraries_override'] = [];
 
+    // A list of libraries removed via override.
+    $libraries_removed = [];
+
     // Get libraries overrides declared by base themes.
     foreach ($base_themes as $base) {
       if (!empty($base->info['libraries-override'])) {
         foreach ($base->info['libraries-override'] as $library => $override) {
           $values['libraries_override'][$base->getPath()][$library] = $override;
+          if ($override) {
+            // If the override adds the library back, remove it from the list.
+            unset($libraries_removed[$library]);
+          }
+          else {
+            $libraries_removed[$library] = $library;
+          }
         }
       }
     }
@@ -187,6 +197,14 @@ public function getActiveTheme(Extension $theme, array $base_themes = []) {
     if (!empty($theme->info['libraries-override'])) {
       foreach ($theme->info['libraries-override'] as $library => $override) {
         $values['libraries_override'][$theme->getPath()][$library] = $override;
+        if ($override) {
+          // If the override adds the library back, remove it from the list.
+          unset($libraries_removed[$library]);
+        }
+        else {
+          // If the override is FALSE and the library exists remove the library.
+          $libraries_removed[$library] = $library;
+        }
       }
     }
 
@@ -238,6 +256,13 @@ public function getActiveTheme(Extension $theme, array $base_themes = []) {
       }
     }
 
+    // Remove the libraries from $values if it was removed in an override.
+    foreach ($values['libraries'] as $key => $library) {
+      if (isset($libraries_removed[$library])) {
+        unset($values['libraries'][$key]);
+      }
+    }
+
     $values['engine'] = isset($theme->engine) ? $theme->engine : NULL;
     $values['owner'] = isset($theme->owner) ? $theme->owner : NULL;
     $values['extension'] = $theme;