diff --git a/src/libunwind.zig b/src/libunwind.zig
index 605206467cd85e487dd17f5f740d2f197f797749..5eb19e8d6765ca80ea4803784b6c2b32136e6b4c 100644
--- a/src/libunwind.zig
+++ b/src/libunwind.zig
@@ -143,6 +143,10 @@ pub fn buildStaticLib(comp: *Compilation, prog_node: std.Progress.Node) BuildErr
         try cflags.append("-Wno-visibility");
         try cflags.append("-Wno-incompatible-pointer-types");
 
+        if (target.os.tag == .windows) {
+            try cflags.append("-Wno-dll-attribute-on-redeclaration");
+        }
+
         c_source_files[i] = .{
             .src_path = try comp.zig_lib_directory.join(arena, &[_][]const u8{unwind_src}),
             .extra_flags = cflags.items,