diff --git a/SOURCE/AVX.INC b/SOURCE/AVX.INC
index 91b2f92..9bd1f1a 100644
--- a/SOURCE/AVX.INC
+++ b/SOURCE/AVX.INC
@@ -1354,6 +1354,8 @@ kmov_instruction:
 	jmp	nomem_instruction_ready
       kmov_f2_w1:
 	or	[rex_prefix],8
+	cmp	[code_type],64
+	jne	illegal_instruction
       kmov_f2:
 	mov	[opcode_prefix],0F2h
 	jmp	nomem_instruction_ready
diff --git a/SOURCE/VERSION.INC b/SOURCE/VERSION.INC
index 7943cee..39da377 100644
--- a/SOURCE/VERSION.INC
+++ b/SOURCE/VERSION.INC
@@ -33,7 +33,7 @@
 ; cannot simply be copied and put under another distribution licence
 ; (including the GNU Public Licence).
 
-VERSION_STRING equ "1.71.61"
+VERSION_STRING equ "1.71.62"
 
 VERSION_MAJOR = 1
 VERSION_MINOR = 71
diff --git a/SOURCE/X86_64.INC b/SOURCE/X86_64.INC
index 7692159..6cf0cda 100644
--- a/SOURCE/X86_64.INC
+++ b/SOURCE/X86_64.INC
@@ -6970,6 +6970,10 @@ store_instruction:
 	jnz	address_immediate_sib_32bit
 	test	ch,not 88h
 	jnz	invalid_address_size
+	test	edx,80000000h
+	jz	address_immediate_sib_store
+	cmp	[address_high],0
+	je	address_immediate_sib_nosignextend
       address_immediate_sib_store:
 	call	store_instruction_code
 	mov	al,100b
diff --git a/WHATSNEW.TXT b/WHATSNEW.TXT
index c753153..c4a89e7 100644
--- a/WHATSNEW.TXT
+++ b/WHATSNEW.TXT
@@ -2,6 +2,13 @@
 Visit http://flatassembler.net/ for more information.
 
 
+version 1.71.62 (May 08, 2017)
+
+[-] Minor correction in "kmovq" error checking.
+
+[-] Minor fix in the encoding of some absolute addresses in long mode.
+
+
 version 1.71.61 (May 04, 2017)
 
 [-] Minor correction in "vcvtpd2dq" error checking.