diff --git a/src/cmd/compile/internal/base/base.go b/src/cmd/compile/internal/base/base.go
index 8caeb41d2f..0c374f1661 100644
--- a/src/cmd/compile/internal/base/base.go
+++ b/src/cmd/compile/internal/base/base.go
@@ -245,7 +245,7 @@ func Compiling(pkgs []string) bool {
 // is done during SSA construction rather than a separate SSA pass,
 // see issue #19054.
 //
-// Third we remove calls to racefuncenter and racefuncexit, for leaf
+// Third, we remove calls to racefuncenter and racefuncexit, for leaf
 // functions without instrumented operations. This is done as part of
 // ssa opt pass via special rule.