diff --git a/camlibs/aox/library.c b/camlibs/aox/library.c
index f85d20800..343cbfac0 100644
--- a/camlibs/aox/library.c
+++ b/camlibs/aox/library.c
@@ -18,6 +18,8 @@
  * Boston, MA 02111-1307, USA.
  */
 
+#define _BSD_SOURCE
+
 #include <config.h>
 
 #include <stdlib.h>
diff --git a/camlibs/ax203/library.c b/camlibs/ax203/library.c
index ad07cd8a1..3a710b8de 100644
--- a/camlibs/ax203/library.c
+++ b/camlibs/ax203/library.c
@@ -16,6 +16,9 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+
+#define _BSD_SOURCE
+
 #include "config.h"
 
 #include <string.h>
diff --git a/camlibs/ax203/tinyjpeg.c b/camlibs/ax203/tinyjpeg.c
index f4b3faa25..740f607db 100644
--- a/camlibs/ax203/tinyjpeg.c
+++ b/camlibs/ax203/tinyjpeg.c
@@ -39,6 +39,8 @@
  *
  */
 
+#define _BSD_SOURCE
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/camlibs/barbie/barbie.c b/camlibs/barbie/barbie.c
index 613459046..abdd5428f 100644
--- a/camlibs/barbie/barbie.c
+++ b/camlibs/barbie/barbie.c
@@ -21,6 +21,8 @@
  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
+#define _POSIX_C_SOURCE 199309L
+
 #include "config.h"
 
 #include <ctype.h>
diff --git a/camlibs/canon/library.c b/camlibs/canon/library.c
index 9e6dd9f47..36bc618e4 100644
--- a/camlibs/canon/library.c
+++ b/camlibs/canon/library.c
@@ -20,6 +20,8 @@
  *
  ****************************************************************************/
 
+#define _BSD_SOURCE
+
 #include "config.h"
 
 #include <stdlib.h>
diff --git a/camlibs/canon/serial.c b/camlibs/canon/serial.c
index 57357522e..204c3aa2f 100644
--- a/camlibs/canon/serial.c
+++ b/camlibs/canon/serial.c
@@ -12,6 +12,8 @@
  *
  ****************************************************************************/
 
+#define _BSD_SOURCE
+
 #include "config.h"
 
 #include <stdio.h>
diff --git a/camlibs/enigma13/enigma13.c b/camlibs/enigma13/enigma13.c
index 09a90bfe9..9ed1b029b 100644
--- a/camlibs/enigma13/enigma13.c
+++ b/camlibs/enigma13/enigma13.c
@@ -19,6 +19,8 @@
  *
  */
 
+#define _POSIX_C_SOURCE 199309L
+
 #include "config.h"
 
 #include <stdio.h>