diff --git a/docs/proposals/kubelet-tls-bootstrap.md b/docs/proposals/kubelet-tls-bootstrap.md
index 95536ca5b02..a0ec6b958d5 100644
--- a/docs/proposals/kubelet-tls-bootstrap.md
+++ b/docs/proposals/kubelet-tls-bootstrap.md
@@ -94,7 +94,7 @@ type CertificateSigningRequest struct {
 
 // This information is immutable after the request is created.
 type CertificateSigningRequestSpec struct {
-	// Raw PKCS#10 CSR data
+	// base64-encoded PKCS#10 CSR data
 	CertificateRequest string `json:"request"`
 
 	// Any extra information the node wishes to send with the request.