diff --git a/include/uv.h b/include/uv.h
index 13b40d86..bf7e88ad 100644
--- a/include/uv.h
+++ b/include/uv.h
@@ -183,7 +183,8 @@ typedef enum {
   UV_EAINONAME,
   UV_EAISERVICE,
   UV_EAISOCKTYPE,
-  UV_ESHUTDOWN
+  UV_ESHUTDOWN,
+  UV_EEXIST
 } uv_err_code;
 
 typedef enum {
diff --git a/src/unix/error.c b/src/unix/error.c
index 96615f36..3520eec7 100644
--- a/src/unix/error.c
+++ b/src/unix/error.c
@@ -83,6 +83,7 @@ uv_err_code uv_translate_sys_error(int sys_errno) {
     case EADDRINUSE: return UV_EADDRINUSE;
     case EADDRNOTAVAIL: return UV_EADDRNOTAVAIL;
     case ENOTCONN: return UV_ENOTCONN;
+    case EEXIST: return UV_EEXIST;
     default: return UV_UNKNOWN;
   }
 
diff --git a/src/uv-common.c b/src/uv-common.c
index ec31688f..51188337 100644
--- a/src/uv-common.c
+++ b/src/uv-common.c
@@ -87,6 +87,7 @@ const char* uv_err_name(uv_err_t err) {
     case UV_EPROTONOSUPPORT: return "EPROTONOSUPPORT";
     case UV_EPROTOTYPE: return "EPROTOTYPE";
     case UV_ETIMEDOUT: return "ETIMEDOUT";
+    case UV_EEXIST: return "EEXIST";
     default:
       assert(0);
       return NULL;
diff --git a/src/win/error.c b/src/win/error.c
index ed4e0d51..8de90bee 100644
--- a/src/win/error.c
+++ b/src/win/error.c
@@ -130,6 +130,7 @@ uv_err_code uv_translate_sys_error(int sys_errno) {
     case ERROR_BROKEN_PIPE:                 return UV_EOF;
     case ERROR_PIPE_BUSY:                   return UV_EBUSY;
     case ERROR_SEM_TIMEOUT:                 return UV_ETIMEDOUT;
+    case ERROR_ALREADY_EXISTS:              return UV_EEXIST;
     default:                                return UV_UNKNOWN;
   }
 }