diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1f297ff9f7..7cb4b0a631 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2016-02-15  Yao Qi  <yao.qi@linaro.org>
+
+	* aarch64-tdep.c (aarch64_analyze_prologue): Remove "0x".
+
 2016-02-12  Yao Qi  <yao.qi@linaro.org>
 
 	* arch/arm-linux.c (arm_linux_get_next_pcs_fixup): Calculate
diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index 798a1b719e..77155ef2cc 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -299,7 +299,7 @@ aarch64_analyze_prologue (struct gdbarch *gdbarch,
 	      if (aarch64_debug)
 		{
 		  debug_printf ("aarch64: prologue analysis gave up "
-				"addr=0x%s opcode=0x%x (orr x register)\n",
+				"addr=%s opcode=0x%x (orr x register)\n",
 				core_addr_to_string_nz (start), insn);
 		}
 	      break;
@@ -365,7 +365,7 @@ aarch64_analyze_prologue (struct gdbarch *gdbarch,
 	{
 	  if (aarch64_debug)
 	    {
-	      debug_printf ("aarch64: prologue analysis gave up addr=0x%s"
+	      debug_printf ("aarch64: prologue analysis gave up addr=%s"
 			    " opcode=0x%x\n",
 			    core_addr_to_string_nz (start), insn);
 	    }