diff --git a/llvm/lib/IR/Function.cpp b/llvm/lib/IR/Function.cpp
index 949eb05cd6f0f..06826a80c614b 100644
--- a/llvm/lib/IR/Function.cpp
+++ b/llvm/lib/IR/Function.cpp
@@ -375,7 +375,7 @@ void Function::splice(Function::iterator ToIt, Function *FromF,
   // Check that FromBeginIt is before FromEndIt.
   auto FromFEnd = FromF->end();
   for (auto It = FromBeginIt; It != FromEndIt; ++It)
-    assert(It != FromBBEnd && "FromBeginIt not before FromEndIt!");
+    assert(It != FromFEnd && "FromBeginIt not before FromEndIt!");
 #endif // EXPENSIVE_CHECKS
   BasicBlocks.splice(ToIt, FromF->BasicBlocks, FromBeginIt, FromEndIt);
 }