diff --git a/src/formats.c b/src/formats.c
index dcb8c360..1eb4585a 100644
--- a/src/formats.c
+++ b/src/formats.c
@@ -595,6 +595,7 @@ static const char* extension_list[] = {
     "wvx",
 
     "x",
+    "x360audio", //fake extension for Unreal Engine 3 XMA (real extension unknown)
     "xa",
     "xa2",
     "xa30",
diff --git a/src/meta/xma_ue3.c b/src/meta/xma_ue3.c
index 19725941..324457cd 100644
--- a/src/meta/xma_ue3.c
+++ b/src/meta/xma_ue3.c
@@ -12,7 +12,8 @@ VGMSTREAM* init_vgmstream_xma_ue3(STREAMFILE *sf) {
 
     /* checks */
     /* .xma: assumed */
-    if (!check_extensions(sf, "xma,"))
+    /* .x360audio: fake produced by UE Viewer */
+    if (!check_extensions(sf, "xma,x360audio,"))
         goto fail;
 
     /* UE3 uses class-like chunks called "SoundNodeWave" to store info and (rarely multi) raw audio data. Other