diff --git a/src/core/lib/gpr/log_linux.cc b/src/core/lib/gpr/log_linux.cc
index 561276f..1fef59b 100644
--- a/src/core/lib/gpr/log_linux.cc
+++ b/src/core/lib/gpr/log_linux.cc
@@ -40,7 +40,7 @@
 #include <time.h>
 #include <unistd.h>
 
-static long gettid(void) { return syscall(__NR_gettid); }
+static long _intl_gettid(void) { return syscall(__NR_gettid); }
 
 void gpr_log(const char* file, int line, gpr_log_severity severity,
              const char* format, ...) {
@@ -70,7 +70,7 @@ void gpr_default_log(gpr_log_func_args* args) {
   gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
   struct tm tm;
   static __thread long tid = 0;
-  if (tid == 0) tid = gettid();
+  if (tid == 0) tid = _intl_gettid();
 
   timer = static_cast<time_t>(now.tv_sec);
   final_slash = strrchr(args->file, '/');
diff --git a/src/core/lib/gpr/log_posix.cc b/src/core/lib/gpr/log_posix.cc
index b6edc14..4bd42fd 100644
--- a/src/core/lib/gpr/log_posix.cc
+++ b/src/core/lib/gpr/log_posix.cc
@@ -31,7 +31,7 @@
 #include <string.h>
 #include <time.h>
 
-static intptr_t gettid(void) { return (intptr_t)pthread_self(); }
+static intptr_t _intl_gettid(void) { return (intptr_t)pthread_self(); }
 
 void gpr_log(const char* file, int line, gpr_log_severity severity,
              const char* format, ...) {
@@ -86,7 +86,7 @@ void gpr_default_log(gpr_log_func_args* args) {
   char* prefix;
   gpr_asprintf(&prefix, "%s%s.%09d %7" PRIdPTR " %s:%d]",
                gpr_log_severity_string(args->severity), time_buffer,
-               (int)(now.tv_nsec), gettid(), display_file, args->line);
+               (int)(now.tv_nsec), _intl_gettid(), display_file, args->line);
 
   fprintf(stderr, "%-70s %s\n", prefix, args->message);
   gpr_free(prefix);
diff --git a/src/core/lib/iomgr/ev_epollex_linux.cc b/src/core/lib/iomgr/ev_epollex_linux.cc
index 08116b3..d48fd8d 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.cc
+++ b/src/core/lib/iomgr/ev_epollex_linux.cc
@@ -1102,7 +1102,7 @@ static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
 }
 
 #ifndef NDEBUG
-static long gettid(void) { return syscall(__NR_gettid); }
+static long _intl_gettid(void) { return syscall(__NR_gettid); }
 #endif
 
 /* pollset->mu lock must be held by the caller before calling this.
@@ -1122,7 +1122,7 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
 #define WORKER_PTR (&worker)
 #endif
 #ifndef NDEBUG
-  WORKER_PTR->originator = gettid();
+  WORKER_PTR->originator = _intl_gettid();
 #endif
   if (GRPC_TRACE_FLAG_ENABLED(grpc_polling_trace)) {
     gpr_log(GPR_INFO,