diff --git a/mobile/.bazelrc b/mobile/.bazelrc
index 242fa4760b0bf..81099a119e0fe 100644
--- a/mobile/.bazelrc
+++ b/mobile/.bazelrc
@@ -23,6 +23,9 @@ build --workspace_status_command=../bazel/get_workspace_status
 build --xcode_version=14.1
 build --use_top_level_targets_for_symlinks
 build --experimental_repository_downloader_retries=2
+# We don't have a ton of Swift in Envoy Mobile, so always build with WMO
+# This also helps work around a bug in rules_swift: https://github.com/bazelbuild/rules_swift/issues/949
+build --swiftcopt=-wmo
 # https://github.com/bazelbuild/rules_jvm_external/issues/445
 build --repo_env=JAVA_HOME=../bazel_tools/jdk
 build --define disable_known_issue_asserts=true