diff --git a/README.md b/README.md
index a54c947f..fcf7850b 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ On a Skylake processor, the parsing speeds (in GB/s) of various processors on th
 - A processor with 
   - AVX2 (i.e., Intel processors starting with the Haswell microarchitecture released 2013 and AMD processors starting with the Zen microarchitecture released 2017), 
   - or SSE 4.2 and CLMUL (i.e., Intel processors going back to Westmere released in 2010 or AMD processors starting with the Jaguar used in the PS4 and XBox One)
-  - or a 64-bit ARM processor (ARMv8-A): this covers a wide range of mobile processors, including all Apple processors currently available for sale, going back as far back as the iPhone 5s (2013).
+  - or a 64-bit ARM processor (ARMv8-A): this covers a wide range of mobile processors, including all Apple processors currently available for sale, going as far back as the iPhone 5s (2013).
 - A recent C++ compiler (e.g., GNU GCC or LLVM CLANG or Visual Studio 2017), we assume C++17. GNU GCC 7 or better or LLVM's clang 6 or better.
 - Some benchmark scripts assume bash and other common utilities, but they are optional.