diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c
index d6b2c4f9a575..aa5ba38f81ff 100644
--- a/drivers/firmware/efi/vars.c
+++ b/drivers/firmware/efi/vars.c
@@ -110,7 +110,7 @@ int efivars_unregister(struct efivars *efivars)
 }
 EXPORT_SYMBOL_GPL(efivars_unregister);
 
-int efivar_supports_writes(void)
+bool efivar_supports_writes(void)
 {
 	return __efivars && __efivars->ops->set_variable;
 }
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 2124e55c02d6..f6b107da1cbc 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -1061,7 +1061,7 @@ bool efivar_is_available(void);
 static inline bool efivar_is_available(void) { return false; }
 #endif
 
-int efivar_supports_writes(void);
+bool efivar_supports_writes(void);
 
 int efivar_lock(void);
 int efivar_trylock(void);