diff --git a/src/plugins.ts b/src/plugins.ts
index 79efe041..0febf02f 100644
--- a/src/plugins.ts
+++ b/src/plugins.ts
@@ -383,7 +383,7 @@ export default class Plugins {
           // a not valid tag indicates that it's a dist-tag like 'latest'
           if (!valid(p.tag)) return `${p.name}@${p.tag}`
 
-          if (p.tag && valid(p.tag) && jitPlugins[p.name] && gt(p.tag, jitPlugins[p.name])) {
+          if (p.tag && valid(p.tag) && jitPlugins[p.name] && valid(jitPlugins[p.name]) && gt(p.tag, jitPlugins[p.name])) {
             // The user has installed a version of the JIT plugin that is newer than the one
             // specified by the root plugin's JIT configuration. In this case, we want to
             // keep the version installed by the user.