diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index b6d99ab..ced60cd 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -1738,7 +1738,7 @@
   Register out = OutputRegister(instruction);
   Register dividend = InputRegisterAt(instruction, 0);
   int64_t imm = Int64FromConstant(second.GetConstant());
-  int64_t abs_imm = std::abs(imm);
+  uint64_t abs_imm = static_cast<uint64_t>(std::abs(imm));
   DCHECK(IsPowerOfTwo(abs_imm));
   int ctz_imm = CTZ(abs_imm);