diff --git a/src/agents/skills/env-overrides.ts b/src/agents/skills/env-overrides.ts
index f06ff942f8a..ec34f8fbd01 100644
--- a/src/agents/skills/env-overrides.ts
+++ b/src/agents/skills/env-overrides.ts
@@ -243,7 +243,7 @@ export function applySkillEnvOverridesFromSnapshot(params: {
   }
   const updates: EnvUpdate[] = [];
 
-  for (const skill of snapshot.skills) {
+  for (const skill of snapshot.skills ?? []) {
     const skillConfig = resolveSkillConfig(config, skill.name);
     if (!skillConfig) {
       continue;