diff --git a/nx/include/switch/services/btdrv.h b/nx/include/switch/services/btdrv.h
index 4e762d10..b26b9ee5 100644
--- a/nx/include/switch/services/btdrv.h
+++ b/nx/include/switch/services/btdrv.h
@@ -249,7 +249,8 @@ typedef struct {
 
 /// GattAttributeUuid
 typedef struct {
-    u8 unk_x0[0x14];           ///< Unknown
+    u32 size;                  ///< UUID size, must be 0x2, 0x4, or 0x10.
+    u8 uuid[0x10];             ///< UUID with the above size.
 } BtdrvGattAttributeUuid;
 
 /// GattId
diff --git a/nx/include/switch/services/btmu.h b/nx/include/switch/services/btmu.h
index 788602ee..bac5f7ea 100644
--- a/nx/include/switch/services/btmu.h
+++ b/nx/include/switch/services/btmu.h
@@ -33,7 +33,9 @@ typedef struct {
 
 /// BleDataPath
 typedef struct {
-    u8 unk_x0[0x18];              ///< Unknown
+    u8 unk_x0;                    ///< Unknown
+    u8 pad[3];                    ///< Padding
+    BtdrvGattAttributeUuid uuid;  ///< \ref BtdrvGattAttributeUuid
 } BtmuBleDataPath;
 
 /// Initialize btm:u.