diff --git a/src/core/hle/service/soc_u.cpp b/src/core/hle/service/soc_u.cpp
index 4606ad743..b7c8eff57 100644
--- a/src/core/hle/service/soc_u.cpp
+++ b/src/core/hle/service/soc_u.cpp
@@ -729,7 +729,11 @@ static void GetSockOpt(Service::Interface* self) {
     u32 socket_handle = cmd_buffer[1];
     u32 level = cmd_buffer[2];
     u32 optname = cmd_buffer[3];
+#ifdef _WIN32
     int optlen = (int)cmd_buffer[4];
+#else
+    socklen_t optlen = (socklen_t)cmd_buffer[4];
+#endif
 
     // 0x100 = static buffer offset (bytes)
     // + 0x4 = 2nd pointer (u32) position