diff --git a/src/lib/libc/include/sys/types.h b/src/lib/libc/include/sys/types.h
index 80ab0f6..249ca8c 100755
--- a/src/lib/libc/include/sys/types.h
+++ b/src/lib/libc/include/sys/types.h
@@ -29,4 +29,6 @@
 typedef unsigned char  uChar;
 typedef unsigned int   uInt;
 
-#endif
\ No newline at end of file
+typedef unsigned long size_t;
+
+#endif