diff --git a/src/wasi_libc.zig b/src/wasi_libc.zig
index 0885f4c5be006c5f462bff52bf170d40026e73c6..80b8904fa6efbfb297e9fd354916e16a305627dc 100644
--- a/src/wasi_libc.zig
+++ b/src/wasi_libc.zig
@@ -242,6 +242,9 @@ fn addCCArgs(
         "-mthread-model",
         "single",
 
+        "-isysroot",
+        "/",
+
         "-iwithsysroot",
         try comp.zig_lib_directory.join(arena, &[_][]const u8{ "libc", "include", triple }),
     });