diff --git a/header.go b/header.go
index 677219ae93..2d251c08b9 100644
--- a/header.go
+++ b/header.go
@@ -271,7 +271,11 @@ func (h *RequestHeader) SetContentLength(contentLength int) {
 func (h *ResponseHeader) isCompressibleContentType() bool {
 	contentType := h.ContentType()
 	return bytes.HasPrefix(contentType, strTextSlash) ||
-		bytes.HasPrefix(contentType, strApplicationSlash)
+			bytes.HasPrefix(contentType, strApplicationSlash) ||
+			bytes.HasPrefix(contentType, strImageSVG) ||
+			bytes.HasPrefix(contentType, strImageIcon) ||
+			bytes.HasPrefix(contentType, strFontSlash) ||
+			bytes.HasPrefix(contentType, strMultipartSlash)
 }
 
 // ContentType returns Content-Type header value.
diff --git a/strings.go b/strings.go
index 2a3d553c26..ee7015454e 100644
--- a/strings.go
+++ b/strings.go
@@ -81,7 +81,12 @@ var (
 	strMultipartFormData   = []byte("multipart/form-data")
 	strBoundary            = []byte("boundary")
 	strBytes               = []byte("bytes")
-	strTextSlash           = []byte("text/")
-	strApplicationSlash    = []byte("application/")
 	strBasicSpace          = []byte("Basic ")
+
+	strApplicationSlash    = []byte("application/")
+	strImageSVG            = []byte("image/svg")
+	strImageIcon           = []byte("image/x-icon")
+	strFontSlash           = []byte("font/")
+	strMultipartSlash      = []byte("multipart/")
+	strTextSlash           = []byte("text/")
 )