diff --git a/third_party/grpc/src/core/support/log_linux.c b/third_party/grpc/src/core/support/log_linux.c
index 93a0c1b4c6..367c92118e 100644
--- a/third_party/grpc/src/core/support/log_linux.c
+++ b/third_party/grpc/src/core/support/log_linux.c
@@ -54,7 +54,7 @@
 #include <sys/syscall.h>
 #include <unistd.h>
 
-static long gettid(void) { return syscall(__NR_gettid); }
+static long sys_gettid(void) { return syscall(__NR_gettid); }
 
 void gpr_log(const char *file, int line, gpr_log_severity severity,
              const char *format, ...) {
@@ -95,7 +95,7 @@ void gpr_default_log(gpr_log_func_args *args) {
 
   gpr_asprintf(&prefix, "%s%s.%09d %7tu %s:%d]",
                gpr_log_severity_string(args->severity), time_buffer,
-               (int)(now.tv_nsec), gettid(), display_file, args->line);
+               (int)(now.tv_nsec), sys_gettid(), display_file, args->line);
 
   fprintf(stderr, "%-60s %s\n", prefix, args->message);
   gpr_free(prefix);
diff --git a/third_party/grpc/src/core/support/log_posix.c b/third_party/grpc/src/core/support/log_posix.c
index 3ff171f99c..f0420a7b3b 100644
--- a/third_party/grpc/src/core/support/log_posix.c
+++ b/third_party/grpc/src/core/support/log_posix.c
@@ -45,7 +45,7 @@
 #include <time.h>
 #include <pthread.h>
 
-static intptr_t gettid(void) { return (intptr_t)pthread_self(); }
+static intptr_t sys_gettid(void) { return (intptr_t)pthread_self(); }
 
 void gpr_log(const char *file, int line, gpr_log_severity severity,
              const char *format, ...) {
@@ -95,7 +95,7 @@ void gpr_default_log(gpr_log_func_args *args) {
 
   fprintf(stderr, "%s%s.%09d %7tu %s:%d] %s\n",
           gpr_log_severity_string(args->severity), time_buffer,
-          (int)(now.tv_nsec), gettid(), display_file, args->line,
+          (int)(now.tv_nsec), sys_gettid(), display_file, args->line,
           args->message);
 }