diff --git a/doc/STYLE_GUIDE.md b/doc/STYLE_GUIDE.md
index 0d3fc00107..f11c5c0523 100644
--- a/doc/STYLE_GUIDE.md
+++ b/doc/STYLE_GUIDE.md
@@ -39,7 +39,7 @@
 * When documenting APIs, note the version the API was introduced in at
   the end of the section. If an API has been deprecated, also note the first
   version that the API appeared deprecated in.
-* When using dashes, use emdashes ("—", Ctrl+Alt+"-" on macOS) surrounded by
+* When using dashes, use emdashes ("—", Option+Shift+"-" on macOS) surrounded by
   spaces, per the New York Times usage.
 * Including assets:
   * If you wish to add an illustration or full program, add it to the