diff --git a/src/attributes/aggressive.h b/src/attributes/aggressive.h
deleted file mode 100644
index c653b12bd..000000000
--- a/src/attributes/aggressive.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
-Copyright (c) 1998-2010, Enno Rehling <enno@eressea.de>
-                         Katja Zedel <katze@felidae.kn-bremen.de
-                         Christian Schlittchen <corwin@amber.kn-bremen.de>
-
-Permission to use, copy, modify, and/or distribute this software for any
-purpose with or without fee is hereby granted, provided that the above
-copyright notice and this permission notice appear in all copies.
-
-THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-**/
-
-#ifndef H_ATTRIBUTE_AGGRESSIVE
-#define H_ATTRIBUTE_AGGRESSIVE
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-  extern struct attrib_type at_aggressive;
-  extern struct attrib *make_aggressive(double probability);
-  extern void init_aggressive(void);
-
-#ifdef __cplusplus
-}
-#endif
-#endif