diff --git a/Userland/Libraries/LibC/bits/pthread_integration.h b/Userland/Libraries/LibC/bits/pthread_integration.h
index 1d37ee2d44..f671cdf064 100644
--- a/Userland/Libraries/LibC/bits/pthread_integration.h
+++ b/Userland/Libraries/LibC/bits/pthread_integration.h
@@ -42,4 +42,9 @@ void __pthread_key_destroy_for_current_thread();
         0, 0, 0, __PTHREAD_MUTEX_NORMAL \
     }
 
+#define __PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP \
+    {                                            \
+        0, 0, 0, __PTHREAD_MUTEX_RECURSIVE       \
+    }
+
 __END_DECLS
diff --git a/Userland/Libraries/LibPthread/pthread.h b/Userland/Libraries/LibPthread/pthread.h
index 220bc94c2d..68c58afafa 100644
--- a/Userland/Libraries/LibPthread/pthread.h
+++ b/Userland/Libraries/LibPthread/pthread.h
@@ -66,6 +66,7 @@ int pthread_setschedparam(pthread_t thread, int policy, const struct sched_param
 #define PTHREAD_MUTEX_RECURSIVE __PTHREAD_MUTEX_RECURSIVE
 #define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
 #define PTHREAD_MUTEX_INITIALIZER __PTHREAD_MUTEX_INITIALIZER
+#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP __PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
 
 #define PTHREAD_PROCESS_PRIVATE 1
 #define PTHREAD_PROCESS_SHARED 2