diff --git a/src/basic/pidref.c b/src/basic/pidref.c
index 9b4922b1607..ef52cd7a421 100644
--- a/src/basic/pidref.c
+++ b/src/basic/pidref.c
@@ -457,11 +457,11 @@ bool pidref_is_automatic(const PidRef *pidref) {
         return pidref && pid_is_automatic(pidref->pid);
 }
 
-static void pidref_hash_func(const PidRef *pidref, struct siphash *state) {
+void pidref_hash_func(const PidRef *pidref, struct siphash *state) {
         siphash24_compress_typesafe(pidref->pid, state);
 }
 
-static int pidref_compare_func(const PidRef *a, const PidRef *b) {
+int pidref_compare_func(const PidRef *a, const PidRef *b) {
         return CMP(a->pid, b->pid);
 }
 
diff --git a/src/basic/pidref.h b/src/basic/pidref.h
index 0198db8f8eb..b71c3bd9d0c 100644
--- a/src/basic/pidref.h
+++ b/src/basic/pidref.h
@@ -108,5 +108,9 @@ int pidref_verify(const PidRef *pidref);
 
 #define TAKE_PIDREF(p) TAKE_GENERIC((p), PidRef, PIDREF_NULL)
 
+struct siphash;
+void pidref_hash_func(const PidRef *pidref, struct siphash *state);
+int pidref_compare_func(const PidRef *a, const PidRef *b);
+
 extern const struct hash_ops pidref_hash_ops;
 extern const struct hash_ops pidref_hash_ops_free; /* Has destructor call for pidref_free(), i.e. expects heap allocated PidRef as keys */