diff --git a/src/lua/swim.lua b/src/lua/swim.lua
index d7dbd36f591d80316ed12114e9d7c353a8ba35f8..b95fe0af2c6c9492f6bfab1ac05210ebf67b5325 100644
--- a/src/lua/swim.lua
+++ b/src/lua/swim.lua
@@ -194,7 +194,10 @@ local function swim_check_uuid(value, func_name)
         return nil
     end
     if type(value) ~= 'string' then
-        return error(func_name..': expected string UUID')
+        if ffi.istype('struct tt_uuid', value) then
+            return value
+        end
+        return error(func_name..': expected string UUID or struct tt_uuid')
     end
     value = uuid.fromstr(value)
     if not value then
diff --git a/test/swim/swim.result b/test/swim/swim.result
index 28135bdceb0b84f286c20ac241f52a244b4ad163..863f8b9d8795b218252fff67119bbaa46f73d693 100644
--- a/test/swim/swim.result
+++ b/test/swim/swim.result
@@ -45,7 +45,7 @@ swim.new({gc_mode = 0})
 ...
 swim.new({uuid = 123})
 ---
-- error: 'builtin/swim.lua:<line>: swim:cfg: expected string UUID'
+- error: 'builtin/swim.lua:<line>: swim:cfg: expected string UUID or struct tt_uuid'
 ...
 swim.new({uuid = '1234'})
 ---
@@ -256,7 +256,8 @@ s1.remove_member()
 ...
 s1:remove_member(100)
 ---
-- error: 'builtin/swim.lua:<line>: swim:remove_member: expected string UUID'
+- error: 'builtin/swim.lua:<line>: swim:remove_member: expected string UUID or struct
+    tt_uuid'
 ...
 s1:remove_member('1234')
 ---
@@ -484,12 +485,22 @@ s1:member_by_uuid(uuid(1)) ~= nil
 ...
 s1:member_by_uuid(50)
 ---
-- error: 'builtin/swim.lua:<line>: swim:member_by_uuid: expected string UUID'
+- error: 'builtin/swim.lua:<line>: swim:member_by_uuid: expected string UUID or struct
+    tt_uuid'
 ...
 s1:member_by_uuid(uuid(2))
 ---
 - null
 ...
+-- UUID can be cdata.
+s1:member_by_uuid(s:uuid())
+---
+- uri: 127.0.0.1:<port>
+  status: alive
+  incarnation: 1
+  uuid: 00000000-0000-1000-8000-000000000001
+  payload_size: 0
+...
 s1:quit()
 ---
 ...
diff --git a/test/swim/swim.test.lua b/test/swim/swim.test.lua
index 48e3d30f619bbf51f0c709873bd9b94b55a06c5a..9d9c87c4a9e7c04727182f9cb36b588295bbe2b1 100644
--- a/test/swim/swim.test.lua
+++ b/test/swim/swim.test.lua
@@ -160,6 +160,9 @@ s1:member_by_uuid(uuid(1)) ~= nil
 s1:member_by_uuid(50)
 s1:member_by_uuid(uuid(2))
 
+-- UUID can be cdata.
+s1:member_by_uuid(s:uuid())
+
 s1:quit()
 s:status()
 s:is_dropped()