diff --git a/disas/libvixl/Makefile.objs b/disas/libvixl/Makefile.objs
index d1e801a..bbe7695 100644
--- a/disas/libvixl/Makefile.objs
+++ b/disas/libvixl/Makefile.objs
@@ -6,6 +6,6 @@ libvixl_OBJS = vixl/utils.o \
 
 # The -Wno-sign-compare is needed only for gcc 4.6, which complains about
 # some signed-unsigned equality comparisons which later gcc versions do not.
-$(addprefix $(obj)/,$(libvixl_OBJS)): QEMU_CFLAGS := -I$(SRC_PATH)/disas/libvixl -Wno-sign-compare $(QEMU_CFLAGS)
+$(addprefix $(obj)/,$(libvixl_OBJS)): QEMU_CFLAGS := -I$(SRC_PATH)/disas/libvixl $(QEMU_CFLAGS) -Wno-sign-compare
 
 common-obj-$(CONFIG_ARM_A64_DIS) += $(libvixl_OBJS)
diff --git a/disas/libvixl/vixl/a64/disasm-a64.cc b/disas/libvixl/vixl/a64/disasm-a64.cc
index 20caba4..25d33aa 100644
--- a/disas/libvixl/vixl/a64/disasm-a64.cc
+++ b/disas/libvixl/vixl/a64/disasm-a64.cc
@@ -2684,12 +2684,11 @@ void Disassembler::AppendRegisterNameToOutput(const Instruction* instr,
   }
 }
 
-
 void Disassembler::AppendPCRelativeOffsetToOutput(const Instruction* instr,
                                                   int64_t offset) {
   USE(instr);
   char sign = (offset < 0) ? '-' : '+';
-  AppendToOutput("#%c0x%" PRIx64, sign, std::abs(offset));
+  AppendToOutput("#%c0x%" PRIx64, sign, llabs(offset));
 }