diff --git a/src/tst/BUILD b/src/tst/BUILD
index fb8689f70a9..8ac21dc1de0 100644
--- a/src/tst/BUILD
+++ b/src/tst/BUILD
@@ -41,6 +41,9 @@ cc_library(
     hdrs = [
         "include/tst/fixture.h",
     ],
+    defines = [
+        "BAZEL_BUILD",
+    ],
     includes = [
         "include",
     ],