diff --git a/README.md b/README.md
index 962706af30d2a..9e1d1e58a1c90 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 **Welcome to Swift!**
 
-Swift is a high performance systems programming language.  It has a clean
+Swift is a high-performance system programming language.  It has a clean
 and modern syntax, and offers seamless access to existing C and Objective-C code
 and frameworks, and is memory safe (by default).