diff --git a/llvm/tools/llvm-ar/llvm-ar.cpp b/llvm/tools/llvm-ar/llvm-ar.cpp
index ef5fab68b947..e0bd7d21dbc6 100644
--- a/llvm/tools/llvm-ar/llvm-ar.cpp
+++ b/llvm/tools/llvm-ar/llvm-ar.cpp
@@ -760,7 +760,7 @@ static int ar_main() {
 
 static int ranlib_main() {
   if (RestOfArgs.size() != 1)
-    fail(ToolName + "takes just one archive as argument");
+    fail(ToolName + " takes just one archive as an argument");
   ArchiveName = RestOfArgs[0];
   return performOperation(CreateSymTab, nullptr);
 }