diff --git a/views.go b/views.go
index 0043dd8..c3bb867 100644
--- a/views.go
+++ b/views.go
@@ -30,7 +30,7 @@ var htmlTemplates = make(map[string]*html.Template, 0)
 
 // Used by resolveResponseContentType
 var acceptHeaderMediaRangeRegex = regexp.MustCompile(`^\s*([^()<>@,;:\\"/\[\]?.=]+)/([^()<>@,;:\\"/\[\]?.=]+)\s*$`)
-var acceptHeaderAcceptParamsRegex = regexp.MustCompile(`^\s*(\w+)=([A-Za-z0-9.-])\s*$`)
+var acceptHeaderAcceptParamsRegex = regexp.MustCompile(`^\s*(\w+)=([A-Za-z0-9.-]+)\s*$`)
 var acceptHeaderWeight = regexp.MustCompile(`^\s*q=0(?:\.([0-9]{0,3}))|1(?:\.0{0,3})\s*$`)
 
 // HTML templates