diff --git a/src/device/device_util.c b/src/device/device_util.c
index 3f503b54f8..38303126bc 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -331,7 +331,7 @@ void compact_resources(struct device *dev)
  * @param index The index of the resource on the device.
  * @return The resource, if it already exists.
  */
-struct resource *probe_resource(struct device *dev, unsigned index)
+struct resource *probe_resource(const struct device *dev, unsigned index)
 {
 	struct resource *res;
 
@@ -401,7 +401,7 @@ struct resource *new_resource(struct device *dev, unsigned index)
  * @param index The index of the resource on the device.
  * return TODO.
  */
-struct resource *find_resource(struct device *dev, unsigned index)
+struct resource *find_resource(const struct device *dev, unsigned index)
 {
 	struct resource *resource;
 
diff --git a/src/include/device/resource.h b/src/include/device/resource.h
index eefaf96e28..1d04e9a1c8 100644
--- a/src/include/device/resource.h
+++ b/src/include/device/resource.h
@@ -62,9 +62,11 @@ struct resource {
 struct device;
 struct bus;
 extern void compact_resources(struct device *dev);
-extern struct resource *probe_resource(struct device *dev, unsigned int index);
+extern struct resource *probe_resource(const struct device *dev,
+				       unsigned int index);
 extern struct resource *new_resource(struct device *dev, unsigned int index);
-extern struct resource *find_resource(struct device *dev, unsigned int index);
+extern struct resource *find_resource(const struct device *dev,
+				      unsigned int index);
 extern resource_t resource_end(struct resource *resource);
 extern resource_t resource_max(struct resource *resource);
 extern void report_resource_stored(struct device *dev,