diff --git a/src/unix/tcp.c b/src/unix/tcp.c
index 8c3b27b8..583cbfd6 100644
--- a/src/unix/tcp.c
+++ b/src/unix/tcp.c
@@ -76,26 +76,26 @@ out:
 }
 
 
-int uv_tcp_bind(uv_tcp_t* tcp, struct sockaddr_in addr) {
-  if (addr.sin_family != AF_INET) {
-    uv_err_new(tcp->loop, EFAULT);
+int uv_tcp_bind(uv_tcp_t* handle, struct sockaddr_in addr) {
+  if (handle->type != UV_TCP || addr.sin_family != AF_INET) {
+    uv_err_new(handle->loop, EFAULT);
     return -1;
   }
 
-  return uv__tcp_bind(tcp,
+  return uv__tcp_bind(handle,
                       AF_INET,
                       (struct sockaddr*)&addr,
                       sizeof(struct sockaddr_in));
 }
 
 
-int uv_tcp_bind6(uv_tcp_t* tcp, struct sockaddr_in6 addr) {
-  if (addr.sin6_family != AF_INET6) {
-    uv_err_new(tcp->loop, EFAULT);
+int uv_tcp_bind6(uv_tcp_t* handle, struct sockaddr_in6 addr) {
+  if (handle->type != UV_TCP || addr.sin6_family != AF_INET6) {
+    uv_err_new(handle->loop, EFAULT);
     return -1;
   }
 
-  return uv__tcp_bind(tcp,
+  return uv__tcp_bind(handle,
                       AF_INET6,
                       (struct sockaddr*)&addr,
                       sizeof(struct sockaddr_in6));
diff --git a/src/unix/udp.c b/src/unix/udp.c
index bbd645f5..84e45107 100644
--- a/src/unix/udp.c
+++ b/src/unix/udp.c
@@ -444,6 +444,11 @@ int uv_udp_init(uv_loop_t* loop, uv_udp_t* handle) {
 
 
 int uv_udp_bind(uv_udp_t* handle, struct sockaddr_in addr, unsigned flags) {
+  if (handle->type != UV_UDP || addr.sin_family != AF_INET) {
+    uv_err_new(handle->loop, EFAULT);
+    return -1;
+  }
+
   return uv__udp_bind(handle,
                       AF_INET,
                       (struct sockaddr*)&addr,
@@ -453,6 +458,11 @@ int uv_udp_bind(uv_udp_t* handle, struct sockaddr_in addr, unsigned flags) {
 
 
 int uv_udp_bind6(uv_udp_t* handle, struct sockaddr_in6 addr, unsigned flags) {
+  if (handle->type != UV_UDP || addr.sin6_family != AF_INET6) {
+    uv_err_new(handle->loop, EFAULT);
+    return -1;
+  }
+
   return uv__udp_bind(handle,
                       AF_INET6,
                       (struct sockaddr*)&addr,
diff --git a/src/win/tcp.c b/src/win/tcp.c
index d909eb30..c4989e11 100644
--- a/src/win/tcp.c
+++ b/src/win/tcp.c
@@ -196,7 +196,7 @@ static int uv__bind(uv_loop_t* loop, uv_tcp_t* handle, int domain,
 int uv_tcp_bind(uv_tcp_t* handle, struct sockaddr_in addr) {
   uv_loop_t* loop = handle->loop;
 
-  if (addr.sin_family != AF_INET) {
+  if (handle->type != UV_TCP || addr.sin_family != AF_INET) {
     uv_set_sys_error(loop, WSAEFAULT);
     return -1;
   }
@@ -212,7 +212,7 @@ int uv_tcp_bind(uv_tcp_t* handle, struct sockaddr_in addr) {
 int uv_tcp_bind6(uv_tcp_t* handle, struct sockaddr_in6 addr) {
   uv_loop_t* loop = handle->loop;
 
-  if (addr.sin6_family != AF_INET6) {
+  if (handle->type != UV_TCP || addr.sin6_family != AF_INET6) {
     uv_set_sys_error(loop, WSAEFAULT);
     return -1;
   }
diff --git a/src/win/udp.c b/src/win/udp.c
index 08449d0d..1d14fb83 100644
--- a/src/win/udp.c
+++ b/src/win/udp.c
@@ -198,7 +198,7 @@ int uv_udp_bind(uv_udp_t* handle, struct sockaddr_in addr,
     unsigned int flags) {
   uv_loop_t* loop = handle->loop;
 
-  if (addr.sin_family != AF_INET) {
+  if (handle->type != UV_UDP || addr.sin_family != AF_INET) {
     uv_set_sys_error(loop, WSAEFAULT);
     return -1;
   }
@@ -215,7 +215,7 @@ int uv_udp_bind6(uv_udp_t* handle, struct sockaddr_in6 addr,
     unsigned int flags) {
   uv_loop_t* loop = handle->loop;
 
-  if (addr.sin6_family != AF_INET6) {
+  if (handle->type != UV_UDP || addr.sin6_family != AF_INET6) {
     uv_set_sys_error(loop, WSAEFAULT);
     return -1;
   }