diff --git a/lib/phlex/csv.rb b/lib/phlex/csv.rb
index 8f2c0aa6..62fa696d 100644
--- a/lib/phlex/csv.rb
+++ b/lib/phlex/csv.rb
@@ -34,10 +34,14 @@ def call(buffer = +"", view_context: nil)
 		buffer
 	end
 
-	def filename
+	def file_name
 		nil
 	end
 
+	def content_type
+		"text/csv"
+	end
+
 	private
 
 	def column(header = nil, value)
diff --git a/lib/phlex/html.rb b/lib/phlex/html.rb
index 1e754f95..f85ea75b 100644
--- a/lib/phlex/html.rb
+++ b/lib/phlex/html.rb
@@ -49,6 +49,14 @@ def unbuffered
 			self.class.__unbuffered_class__.new(self)
 		end
 
+		def file_name
+			nil
+		end
+
+		def content_type
+			"text/html"
+		end
+
 		# This should be extended after all method definitions
 		extend ElementClobberingGuard
 	end
diff --git a/lib/phlex/svg.rb b/lib/phlex/svg.rb
index 76631398..eb655244 100644
--- a/lib/phlex/svg.rb
+++ b/lib/phlex/svg.rb
@@ -8,5 +8,13 @@ class SVG < SGML
 
 		# This should be extended after all method definitions
 		extend ElementClobberingGuard
+
+		def content_type
+			"image/svg+xml"
+		end
+
+		def file_name
+			nil
+		end
 	end
 end