diff --git a/src/basic/ether-addr-util.c b/src/basic/ether-addr-util.c
index 9be4baf1233..b97997e1bfc 100644
--- a/src/basic/ether-addr-util.c
+++ b/src/basic/ether-addr-util.c
@@ -39,7 +39,7 @@ int hw_addr_compare(const struct hw_addr_data *a, const struct hw_addr_data *b)
         return memcmp(a->bytes, b->bytes, a->length);
 }
 
-static void hw_addr_hash_func(const struct hw_addr_data *p, struct siphash *state) {
+void hw_addr_hash_func(const struct hw_addr_data *p, struct siphash *state) {
         assert(p);
         assert(state);
 
diff --git a/src/basic/ether-addr-util.h b/src/basic/ether-addr-util.h
index ae6605fb114..b2a3f0d58c4 100644
--- a/src/basic/ether-addr-util.h
+++ b/src/basic/ether-addr-util.h
@@ -41,6 +41,7 @@ char* hw_addr_to_string(const struct hw_addr_data *addr, char buffer[HW_ADDR_TO_
 
 #define HW_ADDR_NULL ((const struct hw_addr_data){})
 
+void hw_addr_hash_func(const struct hw_addr_data *p, struct siphash *state);
 int hw_addr_compare(const struct hw_addr_data *a, const struct hw_addr_data *b);
 static inline bool hw_addr_equal(const struct hw_addr_data *a, const struct hw_addr_data *b) {
         return hw_addr_compare(a, b) == 0;