diff --git a/tags.go b/tags.go
index 9c17882..2ef9281 100644
--- a/tags.go
+++ b/tags.go
@@ -17,7 +17,7 @@ package gomatrix
 // TagContent contains the data for an m.tag message type
 // https://matrix.org/docs/spec/client_server/r0.4.0.html#m-tag
 type TagContent struct {
-	Tags map[string]TagProperties `json:"tags,omitemmpty"`
+	Tags map[string]TagProperties `json:"tags,omitempty"`
 }
 
 // TagProperties contains the properties of a Tag