diff --git a/include/system/audio.h b/include/system/audio.h
index 13c8ae5..a287389 100644
--- a/include/system/audio.h
+++ b/include/system/audio.h
@@ -20,6 +20,7 @@
 
 #include <stdbool.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <sys/cdefs.h>
 #include <sys/types.h>
 
@@ -1325,6 +1326,23 @@
     return size;
 }
 
+/* converts device address to string sent to audio HAL via set_parameters */
+static char *audio_device_address_to_parameter(audio_devices_t device, const char *address)
+{
+    const size_t kSize = AUDIO_DEVICE_MAX_ADDRESS_LEN + sizeof("a2dp_sink_address=");
+    char param[kSize];
+
+    if (device & AUDIO_DEVICE_OUT_ALL_A2DP)
+        snprintf(param, kSize, "%s=%s", "a2dp_sink_address", address);
+    else if (device & AUDIO_DEVICE_OUT_REMOTE_SUBMIX)
+        snprintf(param, kSize, "%s=%s", "mix", address);
+    else
+        snprintf(param, kSize, "%s", address);
+
+    return strdup(param);
+}
+
+
 __END_DECLS
 
 #endif  // ANDROID_AUDIO_CORE_H