diff --git a/response.go b/response.go
index 4b71855..d97740a 100644
--- a/response.go
+++ b/response.go
@@ -47,7 +47,7 @@ func ReadResponse(rc io.ReadCloser) (*Response, error) {
 
 	// Disregard invalid status codes
 	const minStatus, maxStatus = 1, 6
-	statusClass := resp.Status / 10
+	statusClass := StatusClass(status)
 	if statusClass < minStatus || statusClass > maxStatus {
 		return nil, ErrInvalidResponse
 	}
@@ -71,7 +71,7 @@ func ReadResponse(rc io.ReadCloser) (*Response, error) {
 		return nil, ErrInvalidResponse
 	}
 	// Default mime type of text/gemini; charset=utf-8
-	if statusClass == StatusClassSuccess && meta == "" {
+	if statusClass == StatusSuccess && meta == "" {
 		meta = "text/gemini; charset=utf-8"
 	}
 	resp.Meta = meta
@@ -83,7 +83,7 @@ func ReadResponse(rc io.ReadCloser) (*Response, error) {
 		return nil, ErrInvalidResponse
 	}
 
-	if resp.Status/10 == StatusClassSuccess {
+	if statusClass == StatusSuccess {
 		resp.Body = newReadCloserBody(br, rc)
 	} else {
 		resp.Body = nopReadCloser{}
@@ -207,7 +207,7 @@ func (w *responseWriter) writeHeader(defaultStatus int) {
 	}
 
 	meta := w.meta
-	if status/10 == StatusClassSuccess {
+	if StatusClass(status) == StatusSuccess {
 		w.bodyAllowed = true
 
 		if meta == "" {
diff --git a/status.go b/status.go
index 99dbc30..fcf1686 100644
--- a/status.go
+++ b/status.go
@@ -22,19 +22,10 @@ const (
 	StatusCertificateNotValid      = 62
 )
 
-// Status code categories.
-const (
-	StatusClassInput               = 1
-	StatusClassSuccess             = 2
-	StatusClassRedirect            = 3
-	StatusClassTemporaryFailure    = 4
-	StatusClassPermanentFailure    = 5
-	StatusClassCertificateRequired = 6
-)
-
 // StatusClass returns the status class for this status code.
+// 1x becomes 10, 2x becomes 20, etc.
 func StatusClass(status int) int {
-	return status / 10
+	return (status / 10) * 10
 }
 
 // Meta returns a description of the status code appropriate for use in a response.