diff --git a/dtschema/schemas/i2c/i2c-controller.yaml b/dtschema/schemas/i2c/i2c-controller.yaml
index 8488edd5ecc4..4abcf1a0ddcc 100644
--- a/dtschema/schemas/i2c/i2c-controller.yaml
+++ b/dtschema/schemas/i2c/i2c-controller.yaml
@@ -14,7 +14,7 @@ maintainers:
 
 properties:
   $nodename:
-    pattern: "^i2c(@.+|-[a-z0-9]+)?$"
+    pattern: "^i2c(@.+|-[a-z0-9\\-]+)?$"
 
   i2c-bus:
     type: object