diff --git a/src/globals.d.ts b/src/globals.d.ts
index 79e59f1..b09a6d8 100644
--- a/src/globals.d.ts
+++ b/src/globals.d.ts
@@ -1,5 +1,18 @@
 /* eslint-disable no-var */
 
+/**
+ * `true` if currently running in a Frame Processor runtime
+ */
+declare var _FRAME_PROCESSOR: true | undefined;
+/**
+ * `true` if currently running in a reanimated UI runtime
+ */
+declare var _UI: true | undefined;
+/**
+ * `true` if currently running in a Worklet runtime (frame processor, multithreading, reanimated)
+ */
+declare var _WORKLET: true | undefined;
+
 /**
  * A native logging function (outputs to Xcode console/Android Logcat)
  */