diff --git a/hal/socket/linux/socket_linux.c b/hal/socket/linux/socket_linux.c
index 7d04e4ff..e8a96d31 100644
--- a/hal/socket/linux/socket_linux.c
+++ b/hal/socket/linux/socket_linux.c
@@ -427,6 +427,11 @@ Socket_connectAsync(Socket self, const char* address, int port)
     if (connect(self->fd, (struct sockaddr *) &serverAddress, sizeof(serverAddress)) < 0) {
 
         if (errno != EINPROGRESS) {
+            if (close(self->fd) == -1) {
+                if (DEBUG_SOCKET)
+                    printf("SOCKET: failed to close socket (errno: %i)\n", errno);
+            }
+
             self->fd = -1;
             return false;
         }
diff --git a/hal/socket/win32/socket_win32.c b/hal/socket/win32/socket_win32.c
index 2368f32a..4cba2782 100644
--- a/hal/socket/win32/socket_win32.c
+++ b/hal/socket/win32/socket_win32.c
@@ -382,6 +382,7 @@ Socket_connectAsync(Socket self, const char* address, int port)
 
     if (connect(self->fd, (struct sockaddr *) &serverAddress, sizeof(serverAddress)) == SOCKET_ERROR) {
         if (WSAGetLastError() != WSAEWOULDBLOCK) {
+            closesocket(self->fd);
             self->fd = INVALID_SOCKET;
             return false;
         }