diff --git a/config-linux.md b/config-linux.md
index 7adadba62..7647cbc1a 100644
--- a/config-linux.md
+++ b/config-linux.md
@@ -642,6 +642,7 @@ The values MUST be absolute paths in the [container namespace](glossary.md#conta
 ## <a name="configLinuxMountLabel" />Mount Label
 
 **`mountLabel`** (string, OPTIONAL) will set the Selinux context for the mounts in the container.
+    The value MUST NOT be an empty string.
 
 ### Example
 
diff --git a/schema/config-linux.json b/schema/config-linux.json
index dd5bac013..1dc8c23db 100644
--- a/schema/config-linux.json
+++ b/schema/config-linux.json
@@ -264,7 +264,8 @@
             },
             "mountLabel": {
                 "id": "https://opencontainers.org/schema/bundle/linux/mountLabel",
-                "type": "string"
+                "type": "string",
+                "minLength": 1
             }
         }
     }