diff --git a/include/device.h b/include/device.h
index 68b1c807a..b0a5f5e76 100644
--- a/include/device.h
+++ b/include/device.h
@@ -35,6 +35,13 @@
 
 
 
+#ifndef _HAVE_size_t
+typedef unsigned size_t;
+#define _HAVE_size_t
+#endif
+
+
+
 /*****************************************************************************/
 /*                                   Data                                    */
 /*****************************************************************************/