diff --git a/include/jemalloc/internal/counter.h b/include/jemalloc/internal/counter.h
index 896fd02a..c26a08bd 100644
--- a/include/jemalloc/internal/counter.h
+++ b/include/jemalloc/internal/counter.h
@@ -52,5 +52,8 @@ counter_accum(tsdn_t *tsdn, counter_accum_t *counter, uint64_t accumbytes) {
 }
 
 bool counter_accum_init(counter_accum_t *counter, uint64_t interval);
+void counter_prefork(tsdn_t *tsdn, counter_accum_t *counter);
+void counter_postfork_parent(tsdn_t *tsdn, counter_accum_t *counter);
+void counter_postfork_child(tsdn_t *tsdn, counter_accum_t *counter);
 
 #endif /* JEMALLOC_INTERNAL_COUNTER_H */
diff --git a/include/jemalloc/internal/lockedint.h b/include/jemalloc/internal/lockedint.h
index 6a1f9ad1..56cf646c 100644
--- a/include/jemalloc/internal/lockedint.h
+++ b/include/jemalloc/internal/lockedint.h
@@ -31,12 +31,20 @@ struct locked_zu_s {
 #  define LOCKEDINT_MTX(mtx) (&(mtx))
 #  define LOCKEDINT_MTX_LOCK(tsdn, mu) malloc_mutex_lock(tsdn, &(mu))
 #  define LOCKEDINT_MTX_UNLOCK(tsdn, mu) malloc_mutex_unlock(tsdn, &(mu))
+#  define LOCKEDINT_MTX_PREFORK(tsdn, mu) malloc_mutex_prefork(tsdn, &(mu))
+#  define LOCKEDINT_MTX_POSTFORK_PARENT(tsdn, mu)			\
+    malloc_mutex_postfork_parent(tsdn, &(mu))
+#  define LOCKEDINT_MTX_POSTFORK_CHILD(tsdn, mu)			\
+    malloc_mutex_postfork_child(tsdn, &(mu))
 #else
 #  define LOCKEDINT_MTX_DECLARE(name)
 #  define LOCKEDINT_MTX(ptr) NULL
 #  define LOCKEDINT_MTX_INIT(ptr, name, rank, rank_mode) false
 #  define LOCKEDINT_MTX_LOCK(tsdn, mu) do {} while (0)
 #  define LOCKEDINT_MTX_UNLOCK(tsdn, mu) do {} while (0)
+#  define LOCKEDINT_MTX_PREFORK(tsdn, mu)
+#  define LOCKEDINT_MTX_POSTFORK_PARENT(tsdn, mu)
+#  define LOCKEDINT_MTX_POSTFORK_CHILD(tsdn, mu)
 #endif
 
 static inline uint64_t
diff --git a/src/counter.c b/src/counter.c
index 1b8201e5..6fa9c656 100644
--- a/src/counter.c
+++ b/src/counter.c
@@ -20,3 +20,18 @@ counter_accum_init(counter_accum_t *counter, uint64_t interval) {
 
 	return false;
 }
+
+void
+counter_prefork(tsdn_t *tsdn, counter_accum_t *counter) {
+	LOCKEDINT_MTX_PREFORK(tsdn, counter->mtx);
+}
+
+void
+counter_postfork_parent(tsdn_t *tsdn, counter_accum_t *counter) {
+	LOCKEDINT_MTX_POSTFORK_PARENT(tsdn, counter->mtx);
+}
+
+void
+counter_postfork_child(tsdn_t *tsdn, counter_accum_t *counter) {
+	LOCKEDINT_MTX_POSTFORK_CHILD(tsdn, counter->mtx);
+}