diff --git a/examples/host/cdc_msc_hid/src/hid_app.c b/examples/host/cdc_msc_hid/src/hid_app.c
index 628ab3e7..eab555fc 100644
--- a/examples/host/cdc_msc_hid/src/hid_app.c
+++ b/examples/host/cdc_msc_hid/src/hid_app.c
@@ -68,7 +68,7 @@ void tuh_hid_mounted_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_
 
   // Interface protocol
   const char* protocol_str[] = { "None", "Keyboard", "Mouse" }; // hid_protocol_type_t
-  uint8_t const interface_protocol = tuh_n_hid_interface_protocol(dev_addr, instance);
+  uint8_t const interface_protocol = tuh_hid_interface_protocol(dev_addr, instance);
   printf(", Interface protocol = %s, ", protocol_str[interface_protocol]);
 }
 
diff --git a/src/class/hid/hid_host.c b/src/class/hid/hid_host.c
index e35e4e4d..90a848fc 100644
--- a/src/class/hid/hid_host.c
+++ b/src/class/hid/hid_host.c
@@ -87,24 +87,24 @@ TU_ATTR_ALWAYS_INLINE static inline bool hidh_get_report(uint8_t dev_addr, hidh_
 // Application API
 //--------------------------------------------------------------------+
 
-uint8_t tuh_n_hid_instance_count(uint8_t dev_addr)
+uint8_t tuh_hid_instance_count(uint8_t dev_addr)
 {
   return get_dev(dev_addr)->inst_count;
 }
 
-bool tuh_n_hid_mounted(uint8_t dev_addr, uint8_t instance)
+bool tuh_hid_mounted(uint8_t dev_addr, uint8_t instance)
 {
   hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
   return (hid_itf->ep_in != 0) || (hid_itf->ep_out != 0);
 }
 
-uint8_t tuh_n_hid_interface_protocol(uint8_t dev_addr, uint8_t instance)
+uint8_t tuh_hid_interface_protocol(uint8_t dev_addr, uint8_t instance)
 {
   hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
   return hid_itf->itf_protocol;
 }
 
-bool tuh_n_hid_get_protocol(uint8_t dev_addr, uint8_t instance)
+bool tuh_hid_get_protocol(uint8_t dev_addr, uint8_t instance)
 {
   hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
   return hid_itf->protocol_mode;
@@ -126,7 +126,7 @@ static bool set_protocol_complete(uint8_t dev_addr, tusb_control_request_t const
   return true;
 }
 
-bool tuh_n_hid_set_protocol(uint8_t dev_addr, uint8_t instance, uint8_t protocol)
+bool tuh_hid_set_protocol(uint8_t dev_addr, uint8_t instance, uint8_t protocol)
 {
   hidh_interface_t* hid_itf = get_instance(dev_addr, instance);
   TU_VERIFY(hid_itf->itf_protocol != HID_ITF_PROTOCOL_NONE);
diff --git a/src/class/hid/hid_host.h b/src/class/hid/hid_host.h
index 1537216b..3cf8dc70 100644
--- a/src/class/hid/hid_host.h
+++ b/src/class/hid/hid_host.h
@@ -62,26 +62,25 @@ typedef struct
 } tuh_hid_report_info_t;
 
 //--------------------------------------------------------------------+
-// Application API (Multiple devices)
-// - tud_n   : is multiple devices API
+// Application API
 //--------------------------------------------------------------------+
 
 // Get the number of HID instances
-uint8_t tuh_n_hid_instance_count(uint8_t dev_addr);
+uint8_t tuh_hid_instance_count(uint8_t dev_addr);
 
 // Check if HID instance is mounted
-bool tuh_n_hid_mounted(uint8_t dev_addr, uint8_t instance);
+bool tuh_hid_mounted(uint8_t dev_addr, uint8_t instance);
 
 // Get interface supported protocol (bInterfaceProtocol) check out hid_interface_protocol_enum_t for possible values
-uint8_t tuh_n_hid_interface_protocol(uint8_t dev_addr, uint8_t instance);
+uint8_t tuh_hid_interface_protocol(uint8_t dev_addr, uint8_t instance);
 
 // Get current active protocol: HID_PROTOCOL_BOOT (0) or HID_PROTOCOL_REPORT (1)
 // Note: as HID spec, device will be initialized in Report mode
-bool tuh_n_hid_get_protocol(uint8_t dev_addr, uint8_t instance);
+bool tuh_hid_get_protocol(uint8_t dev_addr, uint8_t instance);
 
 // Set protocol to HID_PROTOCOL_BOOT (0) or HID_PROTOCOL_REPORT (1)
 // This function is only supported by Boot interface (tuh_n_hid_interface_protocol() != NONE)
-bool tuh_n_hid_set_protocol(uint8_t dev_addr, uint8_t instance, uint8_t protocol);
+bool tuh_hid_set_protocol(uint8_t dev_addr, uint8_t instance, uint8_t protocol);
 
 // Parse report descriptor into array of report_info struct and return number of reports.
 // If return 0, this is a ingle report, otherwise it is composite report with 1st byte as ID.
@@ -94,8 +93,6 @@ uint8_t tuh_hid_parse_report_descriptor(tuh_hid_report_info_t* report_info, uint
 // Set Report using control endpoint
 //bool tuh_n_hid_n_set_report_control(uint8_t dev_addr, uint8_t instance, void* report, uint16_t len);
 
-//-------------  -------------//
-
 //--------------------------------------------------------------------+
 // Callbacks (Weak is optional)
 //--------------------------------------------------------------------+
@@ -117,18 +114,6 @@ TU_ATTR_WEAK void tuh_hid_set_report_complete_cb(uint8_t dev_addr, uint8_t insta
 // Invoked when Set Protocol request is complete
 TU_ATTR_WEAK void tuh_hid_set_protocol_complete_cb(uint8_t dev_addr, uint8_t instance, uint8_t protocol);
 
-//--------------------------------------------------------------------+
-// Application API (Single device)
-//--------------------------------------------------------------------+
-
-// Get the number of HID instances
-TU_ATTR_ALWAYS_INLINE static inline
-uint8_t tuh_hid_instance_count(void)
-{
-  return tuh_n_hid_instance_count(1);
-}
-
-
 //--------------------------------------------------------------------+
 // Internal Class Driver API
 //--------------------------------------------------------------------+