diff --git a/src/cmd/go/alldocs.go b/src/cmd/go/alldocs.go
index 90eb3e2a00..954caae9fb 100644
--- a/src/cmd/go/alldocs.go
+++ b/src/cmd/go/alldocs.go
@@ -1193,7 +1193,7 @@
 // and one of its requirements. Each module is identified as a string of the form
 // path@version, except for the main module, which has no @version suffix.
 //
-// The -go flag causes graph to report the module graph as loaded by by the
+// The -go flag causes graph to report the module graph as loaded by the
 // given Go version, instead of the version indicated by the 'go' directive
 // in the go.mod file.
 //
diff --git a/src/cmd/go/internal/modcmd/graph.go b/src/cmd/go/internal/modcmd/graph.go
index 903bd9970f..ac81f26dad 100644
--- a/src/cmd/go/internal/modcmd/graph.go
+++ b/src/cmd/go/internal/modcmd/graph.go
@@ -26,7 +26,7 @@ in text form. Each line in the output has two space-separated fields: a module
 and one of its requirements. Each module is identified as a string of the form
 path@version, except for the main module, which has no @version suffix.
 
-The -go flag causes graph to report the module graph as loaded by by the
+The -go flag causes graph to report the module graph as loaded by the
 given Go version, instead of the version indicated by the 'go' directive
 in the go.mod file.