diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 33d5f1d..14b8252 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -16,11 +16,10 @@
 #include <linux/device.h>
 #include <linux/list.h>
 
-#ifdef CONFIG_REGMAP
-
 struct module;
 struct i2c_client;
 struct spi_device;
+struct regmap;
 
 /* An enum of all the supported cache types */
 enum regcache_type {
@@ -42,6 +41,8 @@
 	unsigned int def;
 };
 
+#ifdef CONFIG_REGMAP
+
 /**
  * Configuration for the register map of a device.
  *