diff --git a/include/linux/pinctrl/pinconf.h b/include/linux/pinctrl/pinconf.h
index d5b72e6e261d6..8c2c88ed46b14 100644
--- a/include/linux/pinctrl/pinconf.h
+++ b/include/linux/pinctrl/pinconf.h
@@ -15,6 +15,7 @@
 #ifdef CONFIG_PINCONF
 
 struct pinctrl_dev;
+struct seq_file;
 
 /**
  * struct pinconf_ops - pin config operations, to be implemented by