diff --git a/build.zig b/build.zig
index d26f1ca..5457506 100644
--- a/build.zig
+++ b/build.zig
@@ -13,6 +13,7 @@ const cppflags = [_][]const u8{
     "-Wno-deprecated-declarations",
     "-Wno-unqualified-std-cast-call",
     "-Wno-bitwise-instead-of-logical", //for notcurses
+    "-Wno-unused-command-line-argument", //zig passes -fno-rtlib-defaultlib when cross-compiling to windows
     "-fno-sanitize=undefined",
     "-gen-cdb-fragment-path",
     ".cache/cdb",
diff --git a/include/thespian/backtrace.h b/include/thespian/backtrace.h
index c93a082..f3f8013 100644
--- a/include/thespian/backtrace.h
+++ b/include/thespian/backtrace.h
@@ -12,9 +12,11 @@ void install_remote_debugger();
 void install_backtrace();
 void install_jitdebugger();
 
+#if !defined(_WIN32)
 void sighdl_debugger(int no, siginfo_t * /*sigi*/, void * /*uco*/);
 void sighdl_remote_debugger(int no, siginfo_t * /*sigi*/, void * /*uco*/);
 void sighdl_backtrace(int no, siginfo_t * /*sigi*/, void * /*uco*/);
+#endif
 
 #ifdef __cplusplus
 }
diff --git a/include/thespian/c/tcp.h b/include/thespian/c/tcp.h
index 8f73f38..ffe18af 100644
--- a/include/thespian/c/tcp.h
+++ b/include/thespian/c/tcp.h
@@ -6,7 +6,11 @@ extern "C" {
 #endif
 
 #include <inttypes.h>
+#if defined(_WIN32)
+#include <ws2tcpip.h>
+#else
 #include <netinet/in.h>
+#endif
 #include <stdint.h>
 
 struct thespian_tcp_acceptor_handle;
diff --git a/test/ip_tcp_client_server_c.cpp b/test/ip_tcp_client_server_c.cpp
index 5507216..1885039 100644
--- a/test/ip_tcp_client_server_c.cpp
+++ b/test/ip_tcp_client_server_c.cpp
@@ -7,7 +7,9 @@
 #include <thespian/c/socket.h>
 #include <thespian/c/tcp.h>
 
+#ifndef _WIN32
 #include <netinet/in.h>
+#endif
 #include <string.h>
 
 // ---------------------------------------------------------------------------