diff --git a/Libraries/LibC/unistd.cpp b/Libraries/LibC/unistd.cpp
index 6881d2e33b..831f9c99ad 100644
--- a/Libraries/LibC/unistd.cpp
+++ b/Libraries/LibC/unistd.cpp
@@ -538,10 +538,13 @@ int ftruncate(int fd, off_t length)
     __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
+__thread int t_cached_tid = -1;
+
 int gettid()
 {
-    int rc = syscall(SC_gettid);
-    __RETURN_WITH_ERRNO(rc, rc, -1);
+    if (t_cached_tid == -1)
+        t_cached_tid = syscall(SC_gettid);
+    return t_cached_tid;
 }
 
 int donate(int tid)