diff --git a/homeassistant/components/camera/__init__.py b/homeassistant/components/camera/__init__.py
index f6b909231ca..49b60183920 100644
--- a/homeassistant/components/camera/__init__.py
+++ b/homeassistant/components/camera/__init__.py
@@ -35,6 +35,7 @@ from homeassistant.components.stream.const import (
 from homeassistant.const import (
     ATTR_ENTITY_ID,
     CONF_FILENAME,
+    CONTENT_TYPE_MULTIPART,
     EVENT_HOMEASSISTANT_START,
     SERVICE_TURN_OFF,
     SERVICE_TURN_ON,
@@ -184,7 +185,7 @@ async def async_get_still_stream(request, image_cb, content_type, interval):
     This method must be run in the event loop.
     """
     response = web.StreamResponse()
-    response.content_type = "multipart/x-mixed-replace; boundary=--frameboundary"
+    response.content_type = CONTENT_TYPE_MULTIPART.format("--frameboundary")
     await response.prepare(request)
 
     async def write_to_mjpeg_stream(img_bytes):
diff --git a/homeassistant/components/ffmpeg/__init__.py b/homeassistant/components/ffmpeg/__init__.py
index f109103a99c..ca752208f12 100644
--- a/homeassistant/components/ffmpeg/__init__.py
+++ b/homeassistant/components/ffmpeg/__init__.py
@@ -7,6 +7,7 @@ import voluptuous as vol
 
 from homeassistant.const import (
     ATTR_ENTITY_ID,
+    CONTENT_TYPE_MULTIPART,
     EVENT_HOMEASSISTANT_START,
     EVENT_HOMEASSISTANT_STOP,
 )
@@ -122,9 +123,9 @@ class FFmpegManager:
     def ffmpeg_stream_content_type(self):
         """Return HTTP content type for ffmpeg stream."""
         if self._major_version is not None and self._major_version > 3:
-            return "multipart/x-mixed-replace;boundary=ffmpeg"
+            return CONTENT_TYPE_MULTIPART.format("ffmpeg")
 
-        return "multipart/x-mixed-replace;boundary=ffserver"
+        return CONTENT_TYPE_MULTIPART.format("ffserver")
 
 
 class FFmpegBase(Entity):