diff --git a/toolchain/defs.bzl b/toolchain/defs.bzl
index 3856490..b55945c 100644
--- a/toolchain/defs.bzl
+++ b/toolchain/defs.bzl
@@ -103,7 +103,7 @@ def _target_linux_gnu(gocpu, zigcpu, glibc_version = ""):
             "libc/include/any-linux-any",
             "libc/include/{}-linux-gnu".format(zigcpu),
             "libc/include/{}-linux-any".format(zigcpu),
-        ] + ["libc/include/x86-linux-any"] if zigcpu == "x86_64" else [],
+        ] + (["libc/include/x86-linux-any"] if zigcpu == "x86_64" else []),
         toplevel_include = ["glibc-hacks"] if fcntl_hack else [],
         compiler_extra_includes = ["glibc-hacks/glibchack-fcntl.h"] if fcntl_hack else [],
         linker_version_scripts = ["glibc-hacks/fcntl.map"] if fcntl_hack else [],
@@ -126,7 +126,7 @@ def _target_linux_musl(gocpu, zigcpu):
             "libc/include/any-linux-any",
             "libc/include/{}-linux-musl".format(zigcpu),
             "libc/include/{}-linux-any".format(zigcpu),
-        ] + ["libc/include/x86-linux-any"] if zigcpu == "x86_64" else [],
+        ] + (["libc/include/x86-linux-any"] if zigcpu == "x86_64" else []),
         linkopts = ["-s", "-w"],
         copts = ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHREAD"],
         bazel_target_cpu = "k8",