diff --git a/src/lib66/utils/set_treeinfo.c b/src/lib66/utils/set_treeinfo.c
index 3495a5e4fec41ccb9a37328b15247454e6d5d944..651732cb87830da5442f8b70a032552e05bb1516 100644
--- a/src/lib66/utils/set_treeinfo.c
+++ b/src/lib66/utils/set_treeinfo.c
@@ -12,8 +12,6 @@
  * except according to the terms contained in the LICENSE file./
  */
 
-#include <stddef.h>
-
 #include <oblibs/log.h>
 
 #include <66/utils.h>