diff --git a/README.md b/README.md
index 0fb4050047..81018d8d30 100644
--- a/README.md
+++ b/README.md
@@ -150,7 +150,7 @@ affect compilation:
 
 Building on MacOS assumes that the "Command Tools for Xcode" is installed.
 This can be downloaded from https://developer.apple.com/download/more/
-or if you have Xcode already installed you can run "Xcode-select --install".
+or if you have Xcode already installed you can run "xcode-select --install".
 This will add /usr/include to the system and install the compiler and other
 tools so that they can be easily found.