diff --git a/regress/Makefile b/regress/Makefile
index 4a13e0b4..884dfa7a 100644
--- a/regress/Makefile
+++ b/regress/Makefile
@@ -15,6 +15,7 @@ regress \
 
 TESTS:=\
 test-pthread-basic \
+test-pthread-once \
 test-pthread-self \
 test-pthread-tls \
 
diff --git a/regress/test-pthread-once.c++ b/regress/test-pthread-once.c++
new file mode 100644
index 00000000..ccaf926e
--- /dev/null
+++ b/regress/test-pthread-once.c++
@@ -0,0 +1,58 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+    This program is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    This program is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+    more details.
+
+    You should have received a copy of the GNU General Public License along with
+    this program. If not, see <http://www.gnu.org/licenses/>.
+
+    test-pthread-once.c++
+    Tests whether basic pthread_once() support works.
+
+*******************************************************************************/
+
+#include <pthread.h>
+
+#include "test.h"
+
+static int init_counter = 0;
+static pthread_once_t init_counter_once = PTHREAD_ONCE_INIT;
+
+void init_counter_increase()
+{
+	init_counter++;
+}
+
+void* thread_routine(void*)
+{
+	pthread_once(&init_counter_once, init_counter_increase);
+
+	return NULL;
+}
+
+int main(void)
+{
+	int errnum;
+
+	pthread_once(&init_counter_once, init_counter_increase);
+
+	pthread_t thread;
+	if ( (errnum = pthread_create(&thread, NULL, &thread_routine, NULL)) )
+		test_error(errnum, "pthread_create");
+
+	if ( (errnum = pthread_join(thread, NULL)) )
+		test_error(errnum, "pthread_join");
+
+	test_assert(init_counter == 1);
+
+	return 0;
+}