diff --git a/src/build/GhosttyLibVt.zig b/src/build/GhosttyLibVt.zig
index 1f5f72b84..a574bbf0c 100644
--- a/src/build/GhosttyLibVt.zig
+++ b/src/build/GhosttyLibVt.zig
@@ -94,12 +94,19 @@ fn initLib(
     );
 
     if (kind == .static) {
+        const is_msvc_abi = target.result.abi == .msvc;
+
         // These must be bundled since we're compiling into a static lib.
         // Otherwise, you get undefined symbol errors. This could cause
         // problems if you're linking multiple static Zig libraries but
         // we'll cross that bridge when we get to it.
-        lib.bundle_compiler_rt = true;
-        lib.bundle_ubsan_rt = true;
+        //
+        // On MSVC targets, the MSVC runtime provides these, and Zig's
+        // bundled versions produce object files with ELF-style linker
+        // directives (e.g. /exclude-symbols) and COMDAT sections that
+        // are incompatible with the MSVC linker (LNK1143, LNK4229).
+        lib.bundle_compiler_rt = !is_msvc_abi;
+        lib.bundle_ubsan_rt = !is_msvc_abi;
 
         // Enable PIC so the static library can be linked into PIE
         // executables, which is the default on most Linux distributions.