diff --git a/lld/test/ELF/mips-n32-rels.s b/lld/test/ELF/mips-n32-rels.s
--- a/lld/test/ELF/mips-n32-rels.s
+++ b/lld/test/ELF/mips-n32-rels.s
@@ -51,7 +51,7 @@
 # ELF: Data:                 2's complement, big endian
 # ELF: Version:              1 (current)
 # ELF: OS/ABI:               UNIX - System V
-# ELF: ABI Version:          0x0
+# ELF: ABI Version:          0
 # ELF: Type:                 EXEC (Executable file)
 # ELF: Machine:              MIPS R3000
 # ELF: Version:              0x1
diff --git a/llvm/test/tools/llvm-objcopy/ELF/partitions.test b/llvm/test/tools/llvm-objcopy/ELF/partitions.test
--- a/llvm/test/tools/llvm-objcopy/ELF/partitions.test
+++ b/llvm/test/tools/llvm-objcopy/ELF/partitions.test
@@ -17,7 +17,7 @@
 MAIN-NEXT:   Data:                              2's complement, little endian
 MAIN-NEXT:   Version:                           1 (current)
 MAIN-NEXT:   OS/ABI:                            UNIX - System V
-MAIN-NEXT:   ABI Version:                       0x0
+MAIN-NEXT:   ABI Version:                       0
 MAIN-NEXT:   Type:                              EXEC (Executable file)
 MAIN-NEXT:   Machine:                           Advanced Micro Devices X86-64
 MAIN-NEXT:   Version:                           0x1
@@ -76,7 +76,7 @@
 PART1-NEXT:   Data:                              2's complement, little endian
 PART1-NEXT:   Version:                           1 (current)
 PART1-NEXT:   OS/ABI:                            UNIX - System V
-PART1-NEXT:   ABI Version:                       0x0
+PART1-NEXT:   ABI Version:                       0
 PART1-NEXT:   Type:                              DYN (Shared object file)
 PART1-NEXT:   Machine:                           Advanced Micro Devices X86-64
 PART1-NEXT:   Version:                           0x1
@@ -131,7 +131,7 @@
 PART2-NEXT:   Data:                              2's complement, little endian
 PART2-NEXT:   Version:                           1 (current)
 PART2-NEXT:   OS/ABI:                            UNIX - System V
-PART2-NEXT:   ABI Version:                       0x0
+PART2-NEXT:   ABI Version:                       0
 PART2-NEXT:   Type:                              DYN (Shared object file)
 PART2-NEXT:   Machine:                           Advanced Micro Devices X86-64
 PART2-NEXT:   Version:                           0x1
diff --git a/llvm/test/tools/llvm-readobj/ELF/file-header-abi-version.test b/llvm/test/tools/llvm-readobj/ELF/file-header-abi-version.test
--- a/llvm/test/tools/llvm-readobj/ELF/file-header-abi-version.test
+++ b/llvm/test/tools/llvm-readobj/ELF/file-header-abi-version.test
@@ -14,13 +14,13 @@
 # RUN: llvm-readelf --file-headers %t.abiver.max | FileCheck %s --match-full-lines --check-prefix=ABIVER-MAX-GNU
 
 # ABIVER-ZERO-LLVM: ABIVersion: 0
-# ABIVER-ZERO-GNU:  ABI Version: 0x0
+# ABIVER-ZERO-GNU:  ABI Version: 0
 
 # ABIVER-ANY-LLVM: ABIVersion: 52
-# ABIVER-ANY-GNU:  ABI Version: 0x34
+# ABIVER-ANY-GNU:  ABI Version: 52
 
 # ABIVER-MAX-LLVM: ABIVersion: 255
-# ABIVER-MAX-GNU:  ABI Version: 0xFF
+# ABIVER-MAX-GNU:  ABI Version: 255
 
 --- !ELF
 FileHeader:
diff --git a/llvm/test/tools/llvm-readobj/ELF/gnu-file-headers.test b/llvm/test/tools/llvm-readobj/ELF/gnu-file-headers.test
--- a/llvm/test/tools/llvm-readobj/ELF/gnu-file-headers.test
+++ b/llvm/test/tools/llvm-readobj/ELF/gnu-file-headers.test
@@ -14,7 +14,7 @@
 # I386-NEXT:  Data:                              2's complement, little endian
 # I386-NEXT:  Version:                           1 (current)
 # I386-NEXT:  OS/ABI:                            UNIX - System V
-# I386-NEXT:  ABI Version:                       0x0
+# I386-NEXT:  ABI Version:                       0
 # I386-NEXT:  Type:                              REL (Relocatable file)
 # I386-NEXT:  Machine:                           Intel 80386
 # I386-NEXT:  Version:                           0x1
@@ -57,7 +57,7 @@
 # X86-64-NEXT:  Data:                              2's complement, little endian
 # X86-64-NEXT:  Version:                           1 (current)
 # X86-64-NEXT:  OS/ABI:                            UNIX - System V
-# X86-64-NEXT:  ABI Version:                       0x0
+# X86-64-NEXT:  ABI Version:                       0
 # X86-64-NEXT:  Type:                              REL (Relocatable file)
 # X86-64-NEXT:  Machine:                           Advanced Micro Devices X86-64
 # X86-64-NEXT:  Version:                           0x1
@@ -101,7 +101,7 @@
 # MIPSEL-NEXT:  Data:                              2's complement, little endian
 # MIPSEL-NEXT:  Version:                           1 (current)
 # MIPSEL-NEXT:  OS/ABI:                            UNIX - System V
-# MIPSEL-NEXT:  ABI Version:                       0x0
+# MIPSEL-NEXT:  ABI Version:                       0
 # MIPSEL-NEXT:  Type:                              REL (Relocatable file)
 # MIPSEL-NEXT:  Machine:                           MIPS R3000
 # MIPSEL-NEXT:  Version:                           0x1
diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -3061,8 +3061,8 @@
   OS << "\n";
   Str = printEnum(e->e_ident[ELF::EI_OSABI], makeArrayRef(ElfOSABI));
   printFields(OS, "OS/ABI:", Str);
-  Str = "0x" + to_hexString(e->e_ident[ELF::EI_ABIVERSION]);
-  printFields(OS, "ABI Version:", Str);
+  printFields(OS,
+              "ABI Version:", std::to_string(e->e_ident[ELF::EI_ABIVERSION]));
   Str = printEnum(e->e_type, makeArrayRef(ElfObjectFileType));
   printFields(OS, "Type:", Str);
   Str = printEnum(e->e_machine, makeArrayRef(ElfMachineType));