diff --git a/llvm/lib/CodeGen/MachineDominators.cpp b/llvm/lib/CodeGen/MachineDominators.cpp
index fcfa574ee6c8..517ac29b6450 100644
--- a/llvm/lib/CodeGen/MachineDominators.cpp
+++ b/llvm/lib/CodeGen/MachineDominators.cpp
@@ -148,7 +148,8 @@ void MachineDominatorTree::verifyDomTree() const {
   OtherDT.recalculate(F);
   if (getRootNode()->getBlock() != OtherDT.getRootNode()->getBlock() ||
       DT->compare(OtherDT)) {
-    errs() << "MachineDominatorTree is not up to date!\nComputed:\n";
+    errs() << "MachineDominatorTree for function " << F.getName()
+           << " is not up to date!\nComputed:\n";
     DT->print(errs());
     errs() << "\nActual:\n";
     OtherDT.print(errs());
diff --git a/llvm/lib/IR/Dominators.cpp b/llvm/lib/IR/Dominators.cpp
index a6127a5ef08d..ad448a3f240c 100644
--- a/llvm/lib/IR/Dominators.cpp
+++ b/llvm/lib/IR/Dominators.cpp
@@ -315,7 +315,8 @@ void DominatorTree::verifyDomTree() const {
   DominatorTree OtherDT;
   OtherDT.recalculate(F);
   if (compare(OtherDT)) {
-    errs() << "DominatorTree is not up to date!\nComputed:\n";
+    errs() << "DominatorTree for function " << F.getName()
+           << " is not up to date!\nComputed:\n";
     print(errs());
     errs() << "\nActual:\n";
     OtherDT.print(errs());