diff --git a/changelogs/client_server/newsfragments/2053.clarification b/changelogs/client_server/newsfragments/2053.clarification
new file mode 100644
index 00000000..2a72a88e
--- /dev/null
+++ b/changelogs/client_server/newsfragments/2053.clarification
@@ -0,0 +1 @@
+Clarify the required fields on ``m.file`` (and similar) messages.
diff --git a/event-schemas/schema/m.room.message#m.audio b/event-schemas/schema/m.room.message#m.audio
index c258b85f..99e28110 100644
--- a/event-schemas/schema/m.room.message#m.audio
+++ b/event-schemas/schema/m.room.message#m.audio
@@ -38,6 +38,7 @@ properties:
     required:
       - msgtype
       - body
+      - url
     type: object
   type:
     enum:
diff --git a/event-schemas/schema/m.room.message#m.file b/event-schemas/schema/m.room.message#m.file
index 2fb4fe50..2389d8a9 100644
--- a/event-schemas/schema/m.room.message#m.file
+++ b/event-schemas/schema/m.room.message#m.file
@@ -53,7 +53,7 @@ properties:
     required:
       - msgtype
       - body
-      - filename
+      - url
     type: object
   type:
     enum:
diff --git a/event-schemas/schema/m.room.message#m.image b/event-schemas/schema/m.room.message#m.image
index 349f78f4..1e6ebeaa 100644
--- a/event-schemas/schema/m.room.message#m.image
+++ b/event-schemas/schema/m.room.message#m.image
@@ -28,6 +28,7 @@ properties:
     required:
       - msgtype
       - body
+      - url
     type: object
   type:
     enum:
diff --git a/event-schemas/schema/m.room.message#m.video b/event-schemas/schema/m.room.message#m.video
index 8a66fdeb..2da7e0bc 100644
--- a/event-schemas/schema/m.room.message#m.video
+++ b/event-schemas/schema/m.room.message#m.video
@@ -59,6 +59,7 @@ properties:
     required:
       - msgtype
       - body
+      - url
     type: object
   type:
     enum: