diff --git a/lib/instrument/visitors/function.js b/lib/instrument/visitors/function.js
index 7186aedb..4d77e917 100644
--- a/lib/instrument/visitors/function.js
+++ b/lib/instrument/visitors/function.js
@@ -554,8 +554,7 @@ function hoistSloppyFunctionDeclaration(declaration) {
 
 	// If any binding in intermediate blocks, do not hoist.
 	// NB This includes function declarations which will be themselves hoisted.
-	const originBlock = declaration.block;
-	let thisBlock = originBlock.parent;
+	let thisBlock = declaration.block.parent;
 	while (thisBlock !== hoistBlock) {
 		if (thisBlock.bindings[varName]) return;
 		thisBlock = thisBlock.parent;