diff --git a/src/crypto/x509/x509.go b/src/crypto/x509/x509.go
index 0d68d82993e..4aca7ca40b1 100644
--- a/src/crypto/x509/x509.go
+++ b/src/crypto/x509/x509.go
@@ -2278,7 +2278,7 @@ type CertificateRequest struct {
 	// Attributes contains the CSR attributes that can parse as
 	// pkix.AttributeTypeAndValueSET.
 	//
-	// Deprecated: use Extensions and ExtraExtensions instead for parsing and
+	// Deprecated: Use Extensions and ExtraExtensions instead for parsing and
 	// generating the requestedExtensions attribute.
 	Attributes []pkix.AttributeTypeAndValueSET
 
diff --git a/src/go/importer/importer.go b/src/go/importer/importer.go
index c809c9ab867..fbbc3c9017f 100644
--- a/src/go/importer/importer.go
+++ b/src/go/importer/importer.go
@@ -73,7 +73,7 @@ func ForCompiler(fset *token.FileSet, compiler string, lookup Lookup) types.Impo
 
 // For calls ForCompiler with a new FileSet.
 //
-// Deprecated: use ForCompiler, which populates a FileSet
+// Deprecated: Use ForCompiler, which populates a FileSet
 // with the positions of objects created by the importer.
 func For(compiler string, lookup Lookup) types.Importer {
 	return ForCompiler(token.NewFileSet(), compiler, lookup)
diff --git a/src/runtime/cpuprof.go b/src/runtime/cpuprof.go
index e00dcb1bbd2..81038f5c48c 100644
--- a/src/runtime/cpuprof.go
+++ b/src/runtime/cpuprof.go
@@ -179,7 +179,7 @@ func (p *cpuProfile) addLostAtomic64(count uint64) {
 // The details of generating that format have changed,
 // so this functionality has been removed.
 //
-// Deprecated: use the runtime/pprof package,
+// Deprecated: Use the runtime/pprof package,
 // or the handlers in the net/http/pprof package,
 // or the testing package's -test.cpuprofile flag instead.
 func CPUProfile() []byte {