diff --git a/BUILDING.md b/BUILDING.md
index 24e74fd0..24dd2d28 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -12,10 +12,7 @@ Build Requirements
 
 - [NASM](http://www.nasm.us) or [YASM](http://yasm.tortall.net)
   (if building x86 or x86-64 SIMD extensions)
-  * If using NASM, 2.10 or later is required.
-  * If using NASM, 2.10 or later (except 2.11.08) is required for an x86-64 Mac
-    build (2.11.08 does not work properly with libjpeg-turbo's x86-64 SIMD code
-    when building macho64 objects.)
+  * If using NASM, 2.13 or later is required.
   * If using YASM, 1.2.0 or later is required.
   * If building on macOS, NASM or YASM can be obtained from
     [MacPorts](http://www.macports.org/) or [Homebrew](http://brew.sh/).
diff --git a/simd/i386/jchuff-sse2.asm b/simd/i386/jchuff-sse2.asm
index 342cc437..28fdb4de 100644
--- a/simd/i386/jchuff-sse2.asm
+++ b/simd/i386/jchuff-sse2.asm
@@ -252,8 +252,7 @@ times 1 << 14 db 15
     call        %%.geteip
 %%.ref:
     %4
-    add         %1, %2
-    sub         %1, %%.ref
+    add         %1, %2 - %%.ref
     jmp         short %%.done
     align       32
 %%.geteip: