diff --git a/CMakeLists.txt b/CMakeLists.txt
index a5f1d26..33b6065 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 3.7)
 project (mastodon-cpp
-         VERSION 0.4.0
+         VERSION 0.4.1
          LANGUAGES CXX
 )
 
diff --git a/README.md b/README.md
index 2a3281b..943ad82 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ All versions below 1.0.0 (SOVERSION 0) are considered unstable and can change an
 
 ## Dependencies
 
- * Tested OS: Linux
+ * Tested OS: GNU/Linux, Termux/Android
  * C++ compiler (tested: gcc 6.4, clang 5.0)
  * [cmake](https://cmake.org/) (tested: 3.9.6)
  * [libcurl](https://curl.haxx.se/) (tested: 7.58.0)
@@ -77,6 +77,7 @@ After you did a `make install`, a project consisting of one file can be compiled
 |         3 | URL changed (HTTP 301 or 308) |
 |         4 | Aborted by user               |
 |        10 | Failed to connect             |
+|        11 | Couldn't resolve host         |
 | 100 - 999 | HTTP status codes             |
 |     65535 | Unknown error                 |
 
diff --git a/src/http_sync.cpp b/src/http_sync.cpp
index 1565f20..2c886c7 100644
--- a/src/http_sync.cpp
+++ b/src/http_sync.cpp
@@ -62,7 +62,7 @@ const std::uint16_t API::http::request_sync(const method &meth,
 {
     using namespace std::placeholders;  // _1, _2, _3
 
-    std::uint16_t ret;
+    std::uint16_t ret = 0;
     ttdebug << "Path is: " << path << '\n';
     
     try
@@ -142,10 +142,15 @@ const std::uint16_t API::http::request_sync(const method &meth,
             return 4;
         }
         else if (std::strncmp(e.what(),
-                         "Failed to connect to", 20) == 0)
+                              "Failed to connect to", 20) == 0)
         {
             ret = 10;
         }
+        else if (std::strncmp(e.what(),
+                              "Couldn't resolve host", 21) == 0)
+        {
+            ret = 11;
+        }
         else
         {
             cerr << "RUNTIME ERROR: " << e.what() << std::endl;
@@ -161,7 +166,7 @@ const std::uint16_t API::http::request_sync(const method &meth,
         return 0xffff;
     }
 
-    return 0;
+    return ret;
 }
 
 const void API::http::get_headers(string &headers) const
diff --git a/src/mastodon-cpp.hpp b/src/mastodon-cpp.hpp
index ab8cdf8..2e9a82d 100644
--- a/src/mastodon-cpp.hpp
+++ b/src/mastodon-cpp.hpp
@@ -48,6 +48,9 @@ namespace Mastodon
  *  |         1 | Invalid call                  |
  *  |         2 | Not implemented               |
  *  |         3 | URL changed (HTTP 301 or 308) |
+ *  |         4 | Aborted by user               |
+*   |        10 | Failed to connect             |
+*   |        11 | Couldn't resolve host         |
  *  | 100 - 999 | HTTP status codes             |
  *  |     65535 | Unknown exception             |
  */