diff --git a/agrcache.install b/agrcache.install
index cdf8511..ea9ed4d 100644
--- a/agrcache.install
+++ b/agrcache.install
@@ -20,3 +20,12 @@ function agrcache_requirements($phase) {
   }
   return $requirements;
 }
+
+/**
+ * Regenerate variables in case previous values were corrupt due to a race
+ * condition.
+ */
+function agrcache_update_7101() {
+  variable_del('agrcache_js_cache_files');
+  variable_del('agrcache_css_cache_files');
+}