diff --git a/test/tools/llvm-readobj/gnu-sections.test b/test/tools/llvm-readobj/gnu-sections.test
index fb90ce44d10..34bcaabf68e 100644
--- a/test/tools/llvm-readobj/gnu-sections.test
+++ b/test/tools/llvm-readobj/gnu-sections.test
@@ -1,6 +1,6 @@
 RUN: llvm-readobj -s %p/Inputs/relocs.obj.elf-i386 --elf-output-style=GNU \
 RUN:   | FileCheck %s -check-prefix ELF32
-RUN: llvm-readobj -s %p/Inputs/relocs.obj.elf-x86_64 --elf-output-style=GNU \
+RUN: llvm-readobj -S %p/Inputs/relocs.obj.elf-x86_64 --elf-output-style=GNU \
 RUN:   | FileCheck %s -check-prefix ELF64
 
 ELF32:    Section Headers:
diff --git a/tools/llvm-readobj/llvm-readobj.cpp b/tools/llvm-readobj/llvm-readobj.cpp
index 51991a3f067..0a76368883a 100644
--- a/tools/llvm-readobj/llvm-readobj.cpp
+++ b/tools/llvm-readobj/llvm-readobj.cpp
@@ -57,12 +57,16 @@ namespace opts {
     cl::desc("Alias for --file-headers"),
     cl::aliasopt(FileHeaders));
 
-  // -sections, -s
+  // -sections, -s, -S
+  // Note: In GNU readelf, -s means --symbols!
   cl::opt<bool> Sections("sections",
     cl::desc("Display all sections."));
   cl::alias SectionsShort("s",
     cl::desc("Alias for --sections"),
     cl::aliasopt(Sections));
+  cl::alias SectionsShortUpper("S",
+    cl::desc("Alias for --sections"),
+    cl::aliasopt(Sections));
 
   // -section-relocations, -sr
   cl::opt<bool> SectionRelocations("section-relocations",