diff --git a/src/ble/gatt-service/audio_input_control_service_server.c b/src/ble/gatt-service/audio_input_control_service_server.c
index cfcce8ddc..6209d4eca 100644
--- a/src/ble/gatt-service/audio_input_control_service_server.c
+++ b/src/ble/gatt-service/audio_input_control_service_server.c
@@ -94,7 +94,7 @@ static uint16_t aics_read_callback(hci_con_handle_t con_handle, uint16_t attribu
 
     if (attribute_handle == aics->audio_input_type_value_handle){
         aics->con_handle = con_handle;
-        return att_read_callback_handle_blob((uint8_t *)aics->info.audio_input_type, strlen(aics->info.audio_input_type), offset, buffer, buffer_size);
+        return att_read_callback_handle_byte((uint8_t)aics->info.audio_input_type, offset, buffer, buffer_size);
     }
 
     if (attribute_handle == aics->audio_input_status_value_handle){
diff --git a/src/ble/gatt-service/audio_input_control_service_server.h b/src/ble/gatt-service/audio_input_control_service_server.h
index c07cffe3f..917e645f9 100644
--- a/src/ble/gatt-service/audio_input_control_service_server.h
+++ b/src/ble/gatt-service/audio_input_control_service_server.h
@@ -91,6 +91,16 @@ typedef enum {
     AICS_AUDIO_INPUT_STATUS_ACTIVE
 } aics_audio_input_status_t;
 
+typedef enum {
+    AICS_AUDIO_INPUT_TYPE_UNSPECIFIED = 0,
+    AICS_AUDIO_INPUT_TYPE_BLUETOOTH_AUDIO_STREAM,
+    AICS_AUDIO_INPUT_TYPE_MICROPHONE,
+    AICS_AUDIO_INPUT_TYPE_ANALOG_INTERFACE,
+    AICS_AUDIO_INPUT_TYPE_DIGITAL_INTERFACE,
+    AICS_AUDIO_INPUT_TYPE_RADIO,
+    AICS_AUDIO_INPUT_TYPE_STREAMING_AUDIO_SOURCE
+} aics_audio_input_type_t;
+
 typedef struct {
     int8_t  gain_setting_db;
     aics_mute_mode_t mute_mode;
@@ -107,7 +117,7 @@ typedef struct {
     aics_audio_input_state_t audio_input_state;
     aics_gain_settings_properties_t gain_settings_properties;
 
-    const char * audio_input_type;
+    aics_audio_input_type_t audio_input_type;
     const char * audio_input_description;
 
     btstack_packet_handler_t packet_handler;