diff --git a/repos/libports/src/lib/libc/pthread.cc b/repos/libports/src/lib/libc/pthread.cc
index 37b03c0e15..09d0b1710a 100644
--- a/repos/libports/src/lib/libc/pthread.cc
+++ b/repos/libports/src/lib/libc/pthread.cc
@@ -903,9 +903,12 @@ extern "C" {
 
 	int pthread_cond_destroy(pthread_cond_t *cond)
 	{
-		if (!cond || !*cond)
+		if (!cond)
 			return EINVAL;
 
+		if (*cond == PTHREAD_COND_INITIALIZER)
+			return 0;
+
 		Libc::Allocator alloc { };
 		destroy(alloc, *cond);
 		*cond = 0;
@@ -967,9 +970,12 @@ extern "C" {
 
 	int pthread_cond_signal(pthread_cond_t *cond)
 	{
-		if (!cond || !*cond)
+		if (!cond)
 			return EINVAL;
 
+		if (*cond == PTHREAD_COND_INITIALIZER)
+			cond_init(cond, NULL);
+
 		pthread_cond *c = *cond;
 
 		pthread_mutex_lock(&c->counter_mutex);
@@ -987,9 +993,12 @@ extern "C" {
 
 	int pthread_cond_broadcast(pthread_cond_t *cond)
 	{
-		if (!cond || !*cond)
+		if (!cond)
 			return EINVAL;
 
+		if (*cond == PTHREAD_COND_INITIALIZER)
+			cond_init(cond, NULL);
+
 		pthread_cond *c = *cond;
 
 		pthread_mutex_lock(&c->counter_mutex);