diff --git a/src/lib/error.c b/src/lib/error.c
index 601b84e47..a7044ffb3 100644
--- a/src/lib/error.c
+++ b/src/lib/error.c
@@ -72,8 +72,7 @@ lumiera_error_tls_init (void)
 LumieraErrorcontext
 lumiera_error_get (void)
 {
-  if (lumiera_error_initialized == PTHREAD_ONCE_INIT)
-    pthread_once (&lumiera_error_initialized, lumiera_error_tls_init);
+  pthread_once (&lumiera_error_initialized, lumiera_error_tls_init);
 
   LumieraErrorcontext self = pthread_getspecific (lumiera_error_tls);
   if (!self)
diff --git a/src/lib/reccondition.c b/src/lib/reccondition.c
index f31154a34..f5d6e4fb5 100644
--- a/src/lib/reccondition.c
+++ b/src/lib/reccondition.c
@@ -46,8 +46,7 @@ lumiera_reccondition_init (LumieraReccondition self,
 {
   if (self)
     {
-      if (recursive_mutexattr_once == PTHREAD_ONCE_INIT)
-        pthread_once (&recursive_mutexattr_once, recursive_mutexattr_init);
+      pthread_once (&recursive_mutexattr_once, recursive_mutexattr_init);
 
       pthread_cond_init (&self->cond, NULL);
       pthread_mutex_init (&self->reccndmutex, &recursive_mutexattr);
diff --git a/src/lib/resourcecollector.c b/src/lib/resourcecollector.c
index 4ce58eaa0..84af12f86 100644
--- a/src/lib/resourcecollector.c
+++ b/src/lib/resourcecollector.c
@@ -74,8 +74,7 @@ lumiera_resourcecollector_run (enum lumiera_resource which, enum lumiera_resourc
 {
   TRACE (resourcecollector_dbg);
 
-  if (lumiera_resourcecollector_once == PTHREAD_ONCE_INIT)
-    pthread_once (&lumiera_resourcecollector_once, lumiera_resourcecollector_init_);
+  pthread_once (&lumiera_resourcecollector_once, lumiera_resourcecollector_init_);
 
   LUMIERA_MUTEX_SECTION (mutex_sync, &lumiera_resourcecollector_lock)
     {
@@ -120,8 +119,7 @@ lumiera_resourcecollector_run (enum lumiera_resource which, enum lumiera_resourc
 LumieraResourcehandler
 lumiera_resourcecollector_register_handler (enum lumiera_resource resource, lumiera_resource_handler_fn handler, void* data)
 {
-  if (lumiera_resourcecollector_once == PTHREAD_ONCE_INIT)
-    pthread_once (&lumiera_resourcecollector_once, lumiera_resourcecollector_init_);
+  pthread_once (&lumiera_resourcecollector_once, lumiera_resourcecollector_init_);
 
   TRACE (resourcecollector_dbg);
 
diff --git a/src/lib/safeclib.c b/src/lib/safeclib.c
index 73a0533ef..b6503a998 100644
--- a/src/lib/safeclib.c
+++ b/src/lib/safeclib.c
@@ -122,8 +122,7 @@ lumiera_tmpbuf_init (void)
 void
 lumiera_tmpbuf_freeall (void)
 {
-  if (lumiera_tmpbuf_tls_once == PTHREAD_ONCE_INIT)
-    pthread_once (&lumiera_tmpbuf_tls_once, lumiera_tmpbuf_init);
+  pthread_once (&lumiera_tmpbuf_tls_once, lumiera_tmpbuf_init);
 
   struct lumiera_tmpbuf_struct* buf = pthread_getspecific (lumiera_tmpbuf_tls_key);
   if (buf)
@@ -139,8 +138,7 @@ lumiera_tmpbuf_freeall (void)
 void*
 lumiera_tmpbuf_provide (size_t size)
 {
-  if (lumiera_tmpbuf_tls_once == PTHREAD_ONCE_INIT)
-    pthread_once (&lumiera_tmpbuf_tls_once, lumiera_tmpbuf_init);
+  pthread_once (&lumiera_tmpbuf_tls_once, lumiera_tmpbuf_init);
 
   struct lumiera_tmpbuf_struct* buf = pthread_getspecific (lumiera_tmpbuf_tls_key);
   if (!buf)