diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index 61bc65616b6..ad4b97c04f7 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -250,7 +250,7 @@ export namespace ProviderTransform {
           isFirstToolCall = false
           continue
         }
-        if (part.type == "tool-call") {
+        if (part.type === "tool-call") {
           // this is a duplicate entry
           delete part.providerOptions?.openrouter?.reasoning_details
         }