diff --git a/libgnucash/engine/gnc-pricedb-p.h b/libgnucash/engine/gnc-pricedb-p.h
index d1cfc343a1c..207a8d22292 100644
--- a/libgnucash/engine/gnc-pricedb-p.h
+++ b/libgnucash/engine/gnc-pricedb-p.h
@@ -91,9 +91,6 @@ typedef struct gnc_price_lookup_helper_s
 } GNCPriceLookupHelper;
 
 #define  gnc_price_set_guid(P,G)  qof_instance_set_guid(QOF_INSTANCE(P),(G))
-void     gnc_pricedb_substitute_commodity(GNCPriceDB *db,
-        gnc_commodity *old_c,
-        gnc_commodity *new_c);
 
 /** register the pricedb object with the gncObject system */
 gboolean gnc_pricedb_register (void);
diff --git a/libgnucash/engine/gnc-pricedb.cpp b/libgnucash/engine/gnc-pricedb.cpp
index fbb4accc325..ae42a8409b5 100644
--- a/libgnucash/engine/gnc-pricedb.cpp
+++ b/libgnucash/engine/gnc-pricedb.cpp
@@ -2744,66 +2744,6 @@ gnc_pricedb_foreach_price(GNCPriceDB *db,
     return unstable_price_traversal(db, f, user_data);
 }
 
-/* ==================================================================== */
-/* commodity substitution */
-
-typedef struct
-{
-    gnc_commodity *old_c;
-    gnc_commodity *new_c;
-} GNCPriceFixupData;
-
-static gboolean
-add_price_to_list (GNCPrice *p, gpointer data)
-{
-    auto list = static_cast<GList**>(data);
-
-    *list = g_list_prepend (*list, p);
-
-    return TRUE;
-}
-
-static void
-gnc_price_fixup_legacy_commods(gpointer data, gpointer user_data)
-{
-    auto p = static_cast<GNCPrice*>(data);
-    auto fixup_data = static_cast<GNCPriceFixupData*>(user_data);
-    gnc_commodity *price_c;
-
-    if (!p) return;
-
-    price_c = gnc_price_get_commodity(p);
-    if (gnc_commodity_equiv(price_c, fixup_data->old_c))
-    {
-        gnc_price_set_commodity (p, fixup_data->new_c);
-    }
-    price_c = gnc_price_get_currency(p);
-    if (gnc_commodity_equiv(price_c, fixup_data->old_c))
-    {
-        gnc_price_set_currency (p, fixup_data->new_c);
-    }
-}
-
-void
-gnc_pricedb_substitute_commodity(GNCPriceDB *db,
-                                 gnc_commodity *old_c,
-                                 gnc_commodity *new_c)
-{
-    GNCPriceFixupData data;
-    GList *prices = nullptr;
-
-    if (!db || !old_c || !new_c) return;
-
-    data.old_c = old_c;
-    data.new_c = new_c;
-
-    gnc_pricedb_foreach_price (db, add_price_to_list, &prices, FALSE);
-
-    g_list_foreach (prices, gnc_price_fixup_legacy_commods, &data);
-
-    g_list_free (prices);
-}
-
 /***************************************************************************/
 
 /* Semi-lame debugging code */
diff --git a/libgnucash/engine/test/utest-gnc-pricedb.c b/libgnucash/engine/test/utest-gnc-pricedb.c
index 25cbc67a617..35577406e9d 100644
--- a/libgnucash/engine/test/utest-gnc-pricedb.c
+++ b/libgnucash/engine/test/utest-gnc-pricedb.c
@@ -1587,11 +1587,6 @@ gnc_price_fixup_legacy_commods(gpointer data, gpointer user_data)// Local: 0:1:0
 test_gnc_price_fixup_legacy_commods (Fixture *fixture, gconstpointer pData)
 {
 }*/
-// Not Used
-/* gnc_pricedb_substitute_commodity
-void
-gnc_pricedb_substitute_commodity(GNCPriceDB *db,// Local: 0:0:0
-*/
 /* gnc_price_print
 void
 gnc_price_print(GNCPrice *p, FILE *f, int indent)// Local: 1:0:0