diff --git a/clang/docs/CommandGuide/clang.rst b/clang/docs/CommandGuide/clang.rst
index 11169e3528940f..a24e138e86a7d2 100644
--- a/clang/docs/CommandGuide/clang.rst
+++ b/clang/docs/CommandGuide/clang.rst
@@ -385,7 +385,7 @@ Code Generation Options
     :option:`-Og` Like :option:`-O1`. In future versions, this option might
     disable different optimizations in order to improve debuggability.
 
-    :option:`-O` Equivalent to :option:`-O2`.
+    :option:`-O` Equivalent to :option:`-O1`.
 
     :option:`-O4` and higher