diff --git a/src/barebox-state/state.h b/src/barebox-state/state.h
index 1235dcb..1befcf4 100644
--- a/src/barebox-state/state.h
+++ b/src/barebox-state/state.h
@@ -189,7 +189,6 @@
 	char raw[];
 };
 
-int state_set_dirty(struct param_d *p, void *priv);
 int state_from_node(struct state *state, struct device_node *node, bool create);
 struct device_node *state_to_node(struct state *state,
 				  struct device_node *parent,
diff --git a/src/barebox-state/state_variables.c b/src/barebox-state/state_variables.c
index 03ea28b..2e4a98c 100644
--- a/src/barebox-state/state_variables.c
+++ b/src/barebox-state/state_variables.c
@@ -34,7 +34,7 @@
  * @param priv
  * @return
  */
-int state_set_dirty(struct param_d *p, void *priv)
+static int state_set_dirty(struct param_d *p, void *priv)
 {
 	struct state_variable *sv = priv;