Index: src/string.c
==================================================================
--- src/string.c
+++ src/string.c
@@ -59,12 +59,11 @@
 	len = strlen(s);
 
 	if ((copy = malloc(len + 1)) == NULL)
 		return NULL;
 
-	memcpy(copy, s, len);
-	copy[len] = 0;
+	memcpy(copy, s, len + 1);
 
 	return copy;
 }
 
 char*

Index: src/tcpsocket.c
==================================================================
--- src/tcpsocket.c
+++ src/tcpsocket.c
@@ -22,10 +22,11 @@
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+#define _C99_SOURCE
 #define _POSIX_SOURCE
 
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>

Index: tests/tests.c
==================================================================
--- tests/tests.c
+++ tests/tests.c
@@ -68,13 +68,13 @@
 	pool = cfw_new(cfw_refpool);
 
 	array = cfw_create(cfw_array,
 	    cfw_create(cfw_string, "Hallo"),
 	    cfw_create(cfw_string, " Welt"),
-	    cfw_create(cfw_string, "!"), NULL);
+	    cfw_create(cfw_string, "!"), (void*)NULL);
 
-	str = cfw_new(cfw_string, NULL);
+	str = cfw_new(cfw_string, (void*)NULL);
 
 	for (i = 0; i < cfw_array_size(array); i++)
 		cfw_string_append(str, cfw_array_get(array, i));
 
 	cfw_unref(pool);