diff --git a/libs/tk/ydk-pixbuf/wscript b/libs/tk/ydk-pixbuf/wscript
index b0a832f8b1..71db5f2560 100644
--- a/libs/tk/ydk-pixbuf/wscript
+++ b/libs/tk/ydk-pixbuf/wscript
@@ -1,7 +1,6 @@
 #!/usr/bin/env python
 from waflib.extras import autowaf as autowaf
 import sys
-import re
 
 # Version of this package (even if built as a child)
 MAJOR = '2'
@@ -53,7 +52,7 @@ def build(bld):
     obj.use             = ''
     obj.uselib          = 'GLIB GIO GOBJECT LIBPNG'
     obj.defines         = [ 'HAVE_CONFIG_H', '_LARGEFILE64_SOURCE', '_REENTRANT', 'G_LOG_DOMAIN="GdkPixbuf"', 'DGDK_PIXBUF_COMPILATION', '_FILE_OFFSET_BITS=64',
-                            'GDK_PIXBUF_ENABLE_BACKEND', 'G_DISABLE_SINGLE_INCLUDES',
+                            'GDK_PIXBUF_ENABLE_BACKEND', 'G_DISABLE_SINGLE_INCLUDES', '_POSIX_C_SOURCE=200809L',
                             'INCLUDE_png', 'INCLUDE_xbm', 'INCLUDE_xpm',
                             'PACKAGE="' + I18N_PACKAGE + '"', 'GDK_PIXBUF_LOCALEDIR=""'
 
@@ -64,6 +63,3 @@ def build(bld):
     if sys.platform == 'darwin':
         obj.uselib     += ' OSX'
         obj.ldflags     = ' -lintl'
-
-    if re.search ("bsd", sys.platform) != None:
-        obj.defines.append('_POSIX_C_SOURCE=200809L')