diff --git a/BUILD b/BUILD
index b3a72fffaf..1cef4b8c4d 100644
--- a/BUILD
+++ b/BUILD
@@ -142,6 +142,7 @@ cc_library(
     ],
     hdrs = ["upbc/generator.h"],
     deps = [
+        map_dep("@absl//absl/base:core_headers"),
         map_dep("@absl//absl/strings"),
         map_dep("@com_google_protobuf//:protobuf"),
         map_dep("@com_google_protobuf//:protoc_lib"),
diff --git a/build_defs.bzl b/build_defs.bzl
index a6e5086fe1..6cf387e7fb 100644
--- a/build_defs.bzl
+++ b/build_defs.bzl
@@ -210,6 +210,7 @@ upb_amalgamation = rule(
 is_bazel = not hasattr(native, "genmpm")
 
 google3_dep_map = {
+    "@absl//absl/base:core_headers": "//third_party/absl/base:core_headers",
     "@absl//absl/strings": "//third_party/absl/strings",
     "@com_google_protobuf//:protoc": "//third_party/protobuf:protoc",
     "@com_google_protobuf//:protobuf": "//third_party/protobuf:protobuf",