diff --git a/test/tools/llvm-size/Inputs/darwin-m1.o b/test/tools/llvm-size/Inputs/darwin-m1.o
new file mode 100644
index 00000000000..9672df524c7
Binary files /dev/null and b/test/tools/llvm-size/Inputs/darwin-m1.o differ
diff --git a/test/tools/llvm-size/darwin-m.test b/test/tools/llvm-size/darwin-m.test
index 23d636ba32b..ade1b724c69 100644
--- a/test/tools/llvm-size/darwin-m.test
+++ b/test/tools/llvm-size/darwin-m.test
@@ -1,7 +1,11 @@
 RUN: llvm-size -m %p/Inputs/darwin-m.o | FileCheck --check-prefix="DARWIN" %s
+RUN: llvm-size -m %p/Inputs/darwin-m.o %p/Inputs/darwin-m1.o | FileCheck --check-prefix="DARWIN2" %s
 
 DARWIN: Segment : 8
 DARWIN-NEXT:	Section (__TEXT, __text): 4
 DARWIN-NEXT:	Section (__DATA, __data): 4
 DARWIN-NEXT:	total 8
 DARWIN-NEXT: total 8
+
+DARWIN2: Inputs/darwin-m.o:
+DARWIN2: Inputs/darwin-m1.o:
diff --git a/tools/llvm-size/llvm-size.cpp b/tools/llvm-size/llvm-size.cpp
index a11532a7c98..903e950bc73 100644
--- a/tools/llvm-size/llvm-size.cpp
+++ b/tools/llvm-size/llvm-size.cpp
@@ -817,11 +817,13 @@ static void printFileSectionSizes(StringRef file) {
   } else if (ObjectFile *o = dyn_cast<ObjectFile>(&Bin)) {
     if (!checkMachOAndArchFlags(o, file))
       return;
+    MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o);
     if (OutputFormat == sysv)
       outs() << o->getFileName() << "  :\n";
+    else if (MachO && OutputFormat == darwin && MoreThanOneFile)
+      outs() << o->getFileName() << ":\n";
     printObjectSectionSizes(o);
     if (OutputFormat == berkeley) {
-      MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o);
       if (!MachO || MoreThanOneFile)
         outs() << o->getFileName();
       outs() << "\n";