diff --git a/common/unit.c b/common/unit.c
index 7379f296d5..113a472a21 100644
--- a/common/unit.c
+++ b/common/unit.c
@@ -2170,13 +2170,13 @@ int unit_bribe_cost(struct unit *punit, struct player *briber)
   cost *= unit_build_shield_cost(punit) / 10;
 
   /* Rule set specific cost modification */
-  cost = (cost
-          * get_target_bonus_effects(NULL, unit_owner(punit), briber,
-                                     game_city_by_number(punit->homecity),
-                                     NULL, unit_tile(punit),
-                                     unit_type(punit), NULL, NULL,
-                                     EFT_UNIT_BRIBE_COST_PCT))
-      / 100;
+  cost += (cost
+           * get_target_bonus_effects(NULL, unit_owner(punit), briber,
+                                      game_city_by_number(punit->homecity),
+                                      NULL, unit_tile(punit),
+                                      unit_type(punit), NULL, NULL,
+                                      EFT_UNIT_BRIBE_COST_PCT))
+       / 100;
 
   /* Veterans are not cheap. */
   {
diff --git a/data/alien/effects.ruleset b/data/alien/effects.ruleset
index e09ed2bf95..523b83b8a4 100644
--- a/data/alien/effects.ruleset
+++ b/data/alien/effects.ruleset
@@ -1032,17 +1032,9 @@ reqs    =
 type    = "Max_Trade_Routes"
 value   = 4
 
-[effect_unit_bribe_cost_standard]
-type	= "Unit_Bribe_Cost_Pct"
-value	= 100
-nreqs	=
-    { "type", "name", "range"
-      "UnitFlag", "Cities", "Local"
-    }
-
 [effect_unit_bribe_cost_settlers]
 type	= "Unit_Bribe_Cost_Pct"
-value	= 50
+value	= -50
 reqs	=
     { "type", "name", "range"
       "UnitFlag", "Cities", "Local"
diff --git a/data/civ1/effects.ruleset b/data/civ1/effects.ruleset
index 1d2d1b078c..cc50604373 100644
--- a/data/civ1/effects.ruleset
+++ b/data/civ1/effects.ruleset
@@ -1432,17 +1432,9 @@ reqs	=
       "Extra", "Pollution", "Local"
     }
 
-[effect_unit_bribe_cost_standard]
-type	= "Unit_Bribe_Cost_Pct"
-value	= 100
-nreqs	=
-    { "type", "name", "range"
-      "UnitFlag", "Cities", "Local"
-    }
-
 [effect_unit_bribe_cost_settlers]
 type	= "Unit_Bribe_Cost_Pct"
-value	= 50
+value	= -50
 reqs	=
     { "type", "name", "range"
       "UnitFlag", "Cities", "Local"
diff --git a/data/civ2/effects.ruleset b/data/civ2/effects.ruleset
index ed9c215906..57af47a9d8 100644
--- a/data/civ2/effects.ruleset
+++ b/data/civ2/effects.ruleset
@@ -2375,17 +2375,9 @@ reqs	=
       "Extra", "Pollution", "Local"
     }
 
-[effect_unit_bribe_cost_standard]
-type	= "Unit_Bribe_Cost_Pct"
-value	= 100
-nreqs	=
-    { "type", "name", "range"
-      "UnitFlag", "Cities", "Local"
-    }
-
 [effect_unit_bribe_cost_settlers]
 type	= "Unit_Bribe_Cost_Pct"
-value	= 50
+value	= -50
 reqs	=
     { "type", "name", "range"
       "UnitFlag", "Cities", "Local"
diff --git a/data/civ2civ3/effects.ruleset b/data/civ2civ3/effects.ruleset
index 004b14c8f2..aab2101855 100644
--- a/data/civ2civ3/effects.ruleset
+++ b/data/civ2civ3/effects.ruleset
@@ -3950,17 +3950,9 @@ reqs	=
       "Extra", "Pollution", "Local"
     }
 
-[effect_unit_bribe_cost_standard]
-type	= "Unit_Bribe_Cost_Pct"
-value	= 100
-nreqs	=
-    { "type", "name", "range"
-      "UnitFlag", "Cities", "Local"
-    }
-
 [effect_unit_bribe_cost_settlers]
 type	= "Unit_Bribe_Cost_Pct"
-value	= 50
+value	= -50
 reqs	=
     { "type", "name", "range"
       "UnitFlag", "Cities", "Local"
diff --git a/data/classic/effects.ruleset b/data/classic/effects.ruleset
index 347f8f8a9f..c8cba7ecab 100644
--- a/data/classic/effects.ruleset
+++ b/data/classic/effects.ruleset
@@ -2463,17 +2463,9 @@ reqs	=
       "Extra", "Pollution", "Local"
     }
 
-[effect_unit_bribe_cost_standard]
-type	= "Unit_Bribe_Cost_Pct"
-value	= 100
-nreqs	=
-    { "type", "name", "range"
-      "UnitFlag", "Cities", "Local"
-    }
-
 [effect_unit_bribe_cost_settlers]
 type	= "Unit_Bribe_Cost_Pct"
-value	= 50
+value	= -50
 reqs	=
     { "type", "name", "range"
       "UnitFlag", "Cities", "Local"
diff --git a/data/experimental/effects.ruleset b/data/experimental/effects.ruleset
index ecf3684178..75709dd388 100644
--- a/data/experimental/effects.ruleset
+++ b/data/experimental/effects.ruleset
@@ -2754,17 +2754,9 @@ reqs	=
       "Extra", "Pollution", "Local"
     }
 
-[effect_unit_bribe_cost_standard]
-type	= "Unit_Bribe_Cost_Pct"
-value	= 100
-nreqs	=
-    { "type", "name", "range"
-      "UnitFlag", "Cities", "Local"
-    }
-
 [effect_unit_bribe_cost_settlers]
 type	= "Unit_Bribe_Cost_Pct"
-value	= 50
+value	= -50
 reqs	=
     { "type", "name", "range"
       "UnitFlag", "Cities", "Local"
diff --git a/data/multiplayer/effects.ruleset b/data/multiplayer/effects.ruleset
index 377e783278..86ef3b7164 100644
--- a/data/multiplayer/effects.ruleset
+++ b/data/multiplayer/effects.ruleset
@@ -2511,17 +2511,9 @@ reqs	=
       "Extra", "Pollution", "Local"
     }
 
-[effect_unit_bribe_cost_standard]
-type	= "Unit_Bribe_Cost_Pct"
-value	= 100
-nreqs	=
-    { "type", "name", "range"
-      "UnitFlag", "Cities", "Local"
-    }
-
 [effect_unit_bribe_cost_settlers]
 type	= "Unit_Bribe_Cost_Pct"
-value	= 50
+value	= -50
 reqs	=
     { "type", "name", "range"
       "UnitFlag", "Cities", "Local"
diff --git a/doc/README.effects b/doc/README.effects
index 589b35348f..e7a21b5a3b 100644
--- a/doc/README.effects
+++ b/doc/README.effects
@@ -200,7 +200,7 @@ Incite_Cost_Pct
     Increases revolt cost by amount percent.
 
 Unit_Bribe_Cost_Pct
-    Keep amount percent of the unit bribe cost. Requirements are from the
+    Increases unit bribe cost by amount percent. Requirements are from the
 point of view of the target unit, not the briber.
 
 Size_Adj
diff --git a/fc_version b/fc_version
index a3f3ba7bcc..6212a141bd 100755
--- a/fc_version
+++ b/fc_version
@@ -30,7 +30,7 @@ DEFAULT_FOLLOW_TAG=stable
 #   - Avoid adding a new mandatory capability to the development branch for
 #     as long as possible.  We want to maintain network compatibility with
 #     the stable branch for as long as possible.
-NETWORK_CAPSTRING_MANDATORY="+Freeciv.Devel-2.6-2013.Aug.29"
+NETWORK_CAPSTRING_MANDATORY="+Freeciv.Devel-2.6-2013.Aug.30"
 NETWORK_CAPSTRING_OPTIONAL=""
 
 FREECIV_DISTRIBUTOR=""