diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index b88fe7e..9acd28d 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-11  Max Filippov  <jcmvbkbc@gmail.com>
+
+	* elf32-xtensa.c (elf_xtensa_do_reloc): Limit const16 opcode
+	immediate field to 16 least significant bits.
+
 2018-12-11  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* elf32-xc16x.c (elf32_xc16x_rtype_to_howto): New function.
diff --git a/bfd/elf32-xtensa.c b/bfd/elf32-xtensa.c
index cf085b7..de960cd 100644
--- a/bfd/elf32-xtensa.c
+++ b/bfd/elf32-xtensa.c
@@ -1957,8 +1957,9 @@
 	}
       else if (opcode == get_const16_opcode ())
 	{
-	  /* ALT used for high 16 bits.  */
-	  newval = relocation >> 16;
+	  /* ALT used for high 16 bits.
+	     Ignore 32-bit overflow.  */
+	  newval = (relocation >> 16) & 0xffff;
 	  opnd = 1;
 	}
       else