diff --git a/common/main/fwd-weapon.h b/common/main/fwd-weapon.h
index a1960c5c1..52e527a10 100644
--- a/common/main/fwd-weapon.h
+++ b/common/main/fwd-weapon.h
@@ -52,7 +52,9 @@ class stored_laser_level;
 struct weapon_info;
 
 struct PHYSFS_File;
+#if 0
 void weapon_info_write(PHYSFS_File *, const weapon_info &);
+#endif
 
 #define REARM_TIME                  (F1_0)
 
diff --git a/similar/main/weapon.cpp b/similar/main/weapon.cpp
index 2a2cfa696..7a8d66601 100644
--- a/similar/main/weapon.cpp
+++ b/similar/main/weapon.cpp
@@ -1514,10 +1514,12 @@ DEFINE_SERIAL_UDT_TO_MESSAGE(v2_weapon_info, w, (w.render_type, w.persistent, w.
 DEFINE_SERIAL_UDT_TO_MESSAGE(weapon_info, w, (w.render_type, w.persistent, w.model_num, w.model_num_inner, w.flash_vclip, w.robot_hit_vclip, w.flash_sound, w.wall_hit_vclip, w.fire_count, w.robot_hit_sound, w.ammo_usage, w.weapon_vclip, w.wall_hit_sound, w.destroyable, w.matter, w.bounce, w.homing_flag, w.speedvar, w.flags, w.flash, w.afterburner_size, w.children, w.energy_usage, w.fire_wait, w.multi_damage_scale, w.bitmap, w.blob_size, w.flash_size, w.impact_size, w.strength, w.speed, w.mass, w.drag, w.thrust, w.po_len_to_width_ratio, w.light, w.lifetime, w.damage_radius, w.picture, w.hires_picture));
 #endif
 
+#if 0
 void weapon_info_write(PHYSFS_File *fp, const weapon_info &w)
 {
 	PHYSFSX_serialize_write(fp, w);
 }
+#endif
 
 /*
  * reads n weapon_info structs from a PHYSFS_file