diff --git a/src/core/gdbstub/gdbstub.cpp b/src/core/gdbstub/gdbstub.cpp
index 9711c9c71..57e683c49 100644
--- a/src/core/gdbstub/gdbstub.cpp
+++ b/src/core/gdbstub/gdbstub.cpp
@@ -514,7 +514,7 @@ static bool IsDataAvailable() {
     fd_set fd_socket;
 
     FD_ZERO(&fd_socket);
-    FD_SET(static_cast<u32>(gdbserver_socket), &fd_socket);
+    FD_SET(gdbserver_socket, &fd_socket);
 
     struct timeval t;
     t.tv_sec = 0;