diff --git a/libc/bionic/pthread_gettid_np.cpp b/libc/bionic/pthread_gettid_np.cpp
index fe85442..1beddc9 100644
--- a/libc/bionic/pthread_gettid_np.cpp
+++ b/libc/bionic/pthread_gettid_np.cpp
@@ -26,8 +26,10 @@
  * SUCH DAMAGE.
  */
 
+#include "private/bionic_defs.h"
 #include "pthread_internal.h"
 
+__BIONIC_WEAK_FOR_NATIVE_BRIDGE
 pid_t pthread_gettid_np(pthread_t t) {
   pthread_internal_t* thread = __pthread_internal_find(t);
   return thread ? thread->tid : -1;