--- src/third_party/mozjs/BUILD.bazel.orig
+++ src/third_party/mozjs/BUILD.bazel
@@ -7,6 +7,9 @@ PLATFORMS = {
     "//bazel/config:linux_ppc64le": ("ppc64le", "linux"),
     "//bazel/config:linux_s390x": ("s390x", "linux"),
     "//bazel/config:windows_x86_64": ("x86_64", "windows"),
+    "//bazel/config:freebsd_aarch64": ("aarch64", "freebsd"),
+    "//bazel/config:freebsd_ppc64le": ("ppc64le", "freebsd"),
+    "//bazel/config:freebsd_x86_64": ("x86_64", "freebsd"),
     "//bazel/config:macos_x86_64": ("x86_64", "macOS"),
     "//bazel/config:macos_aarch64": ("aarch64", "macOS"),
 }
@@ -281,6 +284,10 @@ mongo_cc_library(
         ],
         "//conditions:default": [],
     }),
+    cxxopts = select({
+        "@platforms//os:freebsd": ["-std=c++20"],
+        "//conditions:default": [],
+    }),
     defines = [
         "JS_USE_CUSTOM_ALLOCATOR=1",
         "STATIC_JS_API=1",