diff --git a/Libraries/CMakeLists.txt b/Libraries/CMakeLists.txt
index 57feb6a3347..f5a46c6e772 100644
--- a/Libraries/CMakeLists.txt
+++ b/Libraries/CMakeLists.txt
@@ -11,6 +11,7 @@ add_subdirectory(LibSyntax)
 add_subdirectory(LibTest)
 add_subdirectory(LibTextCodec)
 add_subdirectory(LibThreading)
+add_subdirectory(LibTLS)
 add_subdirectory(LibUnicode)
 add_subdirectory(LibURL)
 add_subdirectory(LibXML)
@@ -23,7 +24,6 @@ endif()
 add_subdirectory(LibHTTP)
 add_subdirectory(LibLine)
 add_subdirectory(LibRequests)
-add_subdirectory(LibTLS)
 add_subdirectory(LibWasm)
 add_subdirectory(LibWebSocket)
 
diff --git a/Libraries/LibTLS/TLSv12.cpp b/Libraries/LibTLS/TLSv12.cpp
index 42ef854f0f9..49ca2ce6fdd 100644
--- a/Libraries/LibTLS/TLSv12.cpp
+++ b/Libraries/LibTLS/TLSv12.cpp
@@ -10,6 +10,13 @@
 #include <LibCrypto/OpenSSL.h>
 #include <LibTLS/TLSv12.h>
 
+#ifdef AK_OS_WINDOWS
+#    include <AK/Windows.h>
+#    define FD_SET_(fd, set) FD_SET(static_cast<SOCKET>(fd), set)
+#else
+#    define FD_SET_ FD_SET
+#endif
+
 #include <openssl/bio.h>
 #include <openssl/err.h>
 #include <openssl/ssl.h>
@@ -32,7 +39,7 @@ static void wait_for_activity(int sock, bool read)
 {
     fd_set fds;
     FD_ZERO(&fds);
-    FD_SET(sock, &fds);
+    FD_SET_(sock, &fds);
 
     if (read)
         select(sock + 1, &fds, nullptr, nullptr, nullptr);
diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index 4949508e107..b80efe4c273 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -8,6 +8,7 @@ add_subdirectory(LibRegex)
 add_subdirectory(LibTest)
 add_subdirectory(LibTextCodec)
 add_subdirectory(LibThreading)
+add_subdirectory(LibTLS)
 add_subdirectory(LibUnicode)
 add_subdirectory(LibURL)
 
@@ -18,7 +19,6 @@ endif()
 
 add_subdirectory(LibCore)
 add_subdirectory(LibDNS)
-add_subdirectory(LibTLS)
 add_subdirectory(LibWasm)
 add_subdirectory(LibXML)