diff --git a/ctools.module b/ctools.module
index 6308ca78828bf01455b86f00ad08a962ee556783..efc8001d9c80750f646713fa8bf6e0f328b0d97d 100644
--- a/ctools.module
+++ b/ctools.module
@@ -282,3 +282,11 @@ function ctools_preprocess_node(&$vars) {
     $vars['template_files'][] = 'node-panel-' . check_plain($vars['node']->panel_identifier);
   }
 }
+
+/**
+ * Ensure the CTools CSS cache is flushed whenever hook_flush_caches is invoked.
+ */
+function ctools_flush_caches() {
+  ctools_include('css');
+  ctools_css_flush_caches();
+}
diff --git a/includes/css.inc b/includes/css.inc
index 283cc8d7bcb6894a0fa449825903374e90cce626..313188a12d7377a227b588598268b6158d071df3 100644
--- a/includes/css.inc
+++ b/includes/css.inc
@@ -154,7 +154,7 @@ function ctools_css_cache($css, $filter = TRUE) {
     file_check_directory($path, FILE_CREATE_DIRECTORY);
   }
 
-  // @todo Is this slow? DOes it matter if it is?
+  // @todo Is this slow? Does it matter if it is?
   $filename = $path . '/' . md5($css) . '.css';
 
   // This will do renames if the file already exists, ensuring we don't
@@ -528,3 +528,10 @@ function ctools_css_filter_default_allowed_values() {
   );
 }
 
+/**
+ * Delegated implementation of hook_flush_caches()
+ */
+function ctools_css_flush_caches() {
+  file_scan_directory(file_create_path('ctools/css'), '.*', array('.', '..', 'CVS'), 'file_delete', TRUE);
+  db_query("TRUNCATE {ctools_css_cache}");
+}