--- a/src/util/sys_defs.h
+++ b/src/util/sys_defs.h
@@ -749,7 +749,8 @@ extern int initgroups(const char *, int)
  /*
   * LINUX.
   */
-#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5)
+#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5) \
+	|| defined(LINUX6)
 #define SUPPORTED
 #define UINT32_TYPE	unsigned int
 #define UINT16_TYPE	unsigned short
