diff --git a/docs/src/errors.rst b/docs/src/errors.rst
index c2daa858..25d0efaf 100644
--- a/docs/src/errors.rst
+++ b/docs/src/errors.rst
@@ -251,6 +251,10 @@ Error constants
 
     operation not supported on socket
 
+.. c:macro:: UV_EOVERFLOW
+
+    value too large for defined data type
+
 .. c:macro:: UV_EPERM
 
     operation not permitted
diff --git a/include/uv.h b/include/uv.h
index deda6ca7..d2bdcc9c 100644
--- a/include/uv.h
+++ b/include/uv.h
@@ -126,6 +126,7 @@ extern "C" {
   XX(ENOTEMPTY, "directory not empty")                                        \
   XX(ENOTSOCK, "socket operation on non-socket")                              \
   XX(ENOTSUP, "operation not supported on socket")                            \
+  XX(EOVERFLOW, "value too large for defined data type")                      \
   XX(EPERM, "operation not permitted")                                        \
   XX(EPIPE, "broken pipe")                                                    \
   XX(EPROTO, "protocol error")                                                \
diff --git a/include/uv/errno.h b/include/uv/errno.h
index aadce9c1..a0ca571b 100644
--- a/include/uv/errno.h
+++ b/include/uv/errno.h
@@ -445,4 +445,10 @@
 # define UV__EILSEQ (-4027)
 #endif
 
+#if defined(EOVERFLOW) && !defined(_WIN32)
+# define UV__EOVERFLOW UV__ERR(EOVERFLOW)
+#else
+# define UV__EOVERFLOW (-4026)
+#endif
+
 #endif /* UV_ERRNO_H_ */