diff --git a/src/sqlite3.c b/src/sqlite3.c
index 4ff97d4a8f6c8d1e569bb4ce3d399149b13dc049..fd0893d53423335a5159c850a6415e19903c089f 100644
--- a/src/sqlite3.c
+++ b/src/sqlite3.c
@@ -246830,11 +246830,21 @@ export_finish:
 }
 /************** End file hw_codec.c *****************************************/
 #endif
+
 #if SQLITE_OS_UNIX
-#if defined(__linux__) && !defined(gettid)
+#include <unistd.h>
 #include <sys/syscall.h>
-#define gettid() syscall(__NR_gettid)
+static inline int OsGetTid(void)
+{
+#if defined(__linux__)
+    return (int)syscall(__NR_gettid);
+#elif defined(__APPLE__)
+    return (int)syscall(SYS_thread_selfid);
+#else
+    return 0;
 #endif
+}
+
 static void ResetLockStatus(void)
 {
   (void)memset(&g_lockStatus, 0, sizeof(g_lockStatus));
@@ -246847,7 +246857,7 @@ static void TryRecordTid(int *tidBuf, int ofs, int lockLen)
   int lockOfs = ofs + lockLen;
   for (int i = ofs; i < lockOfs; i++) {
     if (tidBuf[i] == 0) {
-      tidBuf[i] = gettid();
+      tidBuf[i] = OsGetTid();
     }
   }
 }
@@ -246858,7 +246868,7 @@ static void TryClearTid(int *tidBuf, int ofs, int lockLen)
 {
   int lockOfs = ofs + lockLen;
   for (int i = ofs; i < lockOfs; i++) {
-    if (tidBuf[i] == gettid()) {
+    if (tidBuf[i] == OsGetTid()) {
       tidBuf[i] = 0;
     }
   }