diff --git a/disassembler/disassembler_arm.cc b/disassembler/disassembler_arm.cc
index 68626f6..3e6e33f 100644
--- a/disassembler/disassembler_arm.cc
+++ b/disassembler/disassembler_arm.cc
@@ -16,6 +16,8 @@
 
 #include "disassembler_arm.h"
 
+#include <inttypes.h>
+
 #include <iostream>
 
 #include "base/logging.h"
@@ -711,7 +713,7 @@
                 if (Rn.r == 15 && U == 1) {
                   intptr_t lit_adr = reinterpret_cast<intptr_t>(instr_ptr);
                   lit_adr = RoundDown(lit_adr, 4) + 4 + (imm8 << 2);
-                  args << StringPrintf("  ; 0x%llx", *reinterpret_cast<int64_t*>(lit_adr));
+                  args << StringPrintf("  ; 0x%" PRIx64, *reinterpret_cast<int64_t*>(lit_adr));
                 }
               } else if (Rn.r == 13 && W == 1 && U == L) {  // VPUSH/VPOP
                 opcode << (L == 1 ? "vpop" : "vpush");