diff --git a/src/lib/global/land.config b/src/lib/global/land.config
index f89fddb2..76c0ac17 100644
--- a/src/lib/global/land.config
+++ b/src/lib/global/land.config
@@ -39,6 +39,10 @@
 # Available flags are in land_chr_flags[].  info Unit-types should
 # document them all.
 
+# Do not edit this file to customize a game!  Create your own custom
+# configuration file(s), best next to your econfig, and name them in
+# econfig key config_tables.
+
 config land-chr
 type name                 l_b h_b tech cost ...
  0  "cav  cavalry"         10   5   30  500
diff --git a/src/lib/global/nuke.config b/src/lib/global/nuke.config
index 8a31ba44..a8ae40ee 100644
--- a/src/lib/global/nuke.config
+++ b/src/lib/global/nuke.config
@@ -36,6 +36,10 @@
 # Available flags are in nuke_chr_flags[].  info Nuke-types should
 # document them all.
 
+# Do not edit this file to customize a game!  Create your own custom
+# configuration file(s), best next to your econfig, and name them in
+# econfig key config_tables.
+
 config nuke-chr
 type name           l_b h_b o_b r_b bla dam  cost tech wei flags
  0  "10kt  fission"  50  50  25  70  3  70  10000  280   4 ()
diff --git a/src/lib/global/plane.config b/src/lib/global/plane.config
index a5bd54cf..5833516c 100644
--- a/src/lib/global/plane.config
+++ b/src/lib/global/plane.config
@@ -44,6 +44,10 @@
 # Note if a flag missile is set, then flag VTOL will automatically be
 # set by init_plchr().
 
+# Do not edit this file to customize a game!  Create your own custom
+# configuration file(s), best next to your econfig, and name them in
+# econfig key config_tables.
+
 config plane-chr
 type name                       l_b h_b cre tech cost ...
  0  "f1   Sopwith Camel"          8   2   1   50  400
diff --git a/src/lib/global/ship.config b/src/lib/global/ship.config
index 405cf86a..5b656b25 100644
--- a/src/lib/global/ship.config
+++ b/src/lib/global/ship.config
@@ -46,6 +46,10 @@
 # non-zero amount of those things.  Also note that if nplanes > 0 and
 # flag plane is not set, then flag miss will automatically be set.
 
+# Do not edit this file to customize a game!  Create your own custom
+# configuration file(s), best next to your econfig, and name them in
+# econfig key config_tables.
+
 config ship-chr
 type name                       l_b h_b tech cost ...
  0  "fb   fishing boat"          25  15    0  180