diff --git a/src/libnm-core-impl/nm-setting-infiniband.c b/src/libnm-core-impl/nm-setting-infiniband.c
index 7b242a5393..6d2ed7fb48 100644
--- a/src/libnm-core-impl/nm-setting-infiniband.c
+++ b/src/libnm-core-impl/nm-setting-infiniband.c
@@ -144,6 +144,12 @@ nm_setting_infiniband_get_parent(NMSettingInfiniband *setting)
     return NM_SETTING_INFINIBAND_GET_PRIVATE(setting)->parent;
 }
 
+char *
+nm_setting_infiniband_create_virtual_interface_name(const char *parent, int p_key)
+{
+    return g_strdup_printf("%s.%04x", parent, p_key);
+}
+
 /**
  * nm_setting_infiniband_get_virtual_interface_name:
  * @setting: the #NMSettingInfiniband
@@ -172,7 +178,8 @@ nm_setting_infiniband_get_virtual_interface_name(NMSettingInfiniband *setting)
         priv->virtual_iface_name_p_key         = priv->p_key;
         priv->virtual_iface_name_parent_length = len;
         g_free(priv->virtual_iface_name);
-        priv->virtual_iface_name = g_strdup_printf("%s.%04x", priv->parent, priv->p_key);
+        priv->virtual_iface_name =
+            nm_setting_infiniband_create_virtual_interface_name(priv->parent, priv->p_key);
     }
 
     return priv->virtual_iface_name;
diff --git a/src/libnm-core-intern/nm-core-internal.h b/src/libnm-core-intern/nm-core-internal.h
index 4e1bab4723..1857e03bbd 100644
--- a/src/libnm-core-intern/nm-core-internal.h
+++ b/src/libnm-core-intern/nm-core-internal.h
@@ -321,6 +321,8 @@ typedef gpointer (*NMUtilsCopyFunc)(gpointer);
 const char **
 _nm_ip_address_get_attribute_names(const NMIPAddress *addr, gboolean sorted, guint *out_length);
 
+char *nm_setting_infiniband_create_virtual_interface_name(const char *parent, int p_key);
+
 #define NM_SETTING_WIRED_S390_OPTION_MAX_LEN 200u
 
 void     _nm_setting_wired_clear_s390_options(NMSettingWired *setting);