diff --git a/llvm/tools/llvm-objcopy/MachO/MachOObjcopy.cpp b/llvm/tools/llvm-objcopy/MachO/MachOObjcopy.cpp
index 1394339b27d61..469dc6f7dde6a 100644
--- a/llvm/tools/llvm-objcopy/MachO/MachOObjcopy.cpp
+++ b/llvm/tools/llvm-objcopy/MachO/MachOObjcopy.cpp
@@ -305,7 +305,7 @@ static Error addSection(StringRef SecName, StringRef Filename, Object &Obj) {
 // isValidMachOCannonicalName returns success if Name is a MachO cannonical name
 // ("<segment>,<section>") and lengths of both segment and section names are
 // valid.
-Error isValidMachOCannonicalName(StringRef Name) {
+static Error isValidMachOCannonicalName(StringRef Name) {
   if (Name.count(',') != 1)
     return createStringError(errc::invalid_argument,
                              "invalid section name '%s' (should be formatted "