diff --git a/api/config.lua b/api/config.lua
index a2e97dfc..f62e13cf 100644
--- a/api/config.lua
+++ b/api/config.lua
@@ -609,6 +609,7 @@ function pfUI:LoadConfig()
   pfUI:UpdateConfig("nameplates", nil,           "showcastbar",      "1")
   pfUI:UpdateConfig("nameplates", nil,           "spellname",        "0")
   pfUI:UpdateConfig("nameplates", nil,           "showdebuffs",      "0")
+  pfUI:UpdateConfig("nameplates", nil,           "guessdebuffs",     "1")
   pfUI:UpdateConfig("nameplates", nil,           "clickthrough",     "0")
   pfUI:UpdateConfig("nameplates", nil,           "rightclick",       "1")
   pfUI:UpdateConfig("nameplates", nil,           "clickthreshold",   "0.5")
diff --git a/modules/gui.lua b/modules/gui.lua
index b1a98c7d..4d4fd29d 100644
--- a/modules/gui.lua
+++ b/modules/gui.lua
@@ -2030,6 +2030,7 @@ pfUI:RegisterModule("gui", "vanilla:tbc", function ()
       CreateConfig(U["nameplates"], T["Enable Castbars"], C.nameplates, "showcastbar", "checkbox")
       CreateConfig(U["nameplates"], T["Enable Spellname"], C.nameplates, "spellname", "checkbox")
       CreateConfig(U["nameplates"], T["Enable Debuffs"], C.nameplates, "showdebuffs", "checkbox")
+      CreateConfig(U["nameplates"], T["Estimate Debuffs"], C.nameplates, "guessdebuffs", "checkbox")
       CreateConfig(U["nameplates"], T["Enable Class Colors On Enemies"], C.nameplates, "enemyclassc", "checkbox")
       CreateConfig(U["nameplates"], T["Enable Class Colors On Friends"], C.nameplates, "friendclassc", "checkbox")
       CreateConfig(U["nameplates"], T["Raid Icon Size"], C.nameplates, "raidiconsize")
diff --git a/modules/nameplates.lua b/modules/nameplates.lua
index 3ad560a9..b4c91900 100644
--- a/modules/nameplates.lua
+++ b/modules/nameplates.lua
@@ -464,25 +464,28 @@ pfUI:RegisterModule("nameplates", "vanilla:tbc", function ()
 
     -- update debuffs
     if C.nameplates["showdebuffs"] == "1" then
-      -- update debuff caches
-      local verify = string.format("%s:%s", (name or ""), (level or ""))
 
-      if unitstr then
-        -- cache all debuffs
-        plate:CacheDebuffs(unitstr)
-        plate.debuffcache.valid = verify
-      elseif plate.debuffcache and plate.debuffcache.valid == verify then
-        -- delete timed out caches
-        for id, data in pairs(plate.debuffcache) do
-          if data.stop and data.stop < GetTime() then
-            table.remove(plate.debuffcache, id)
+      -- update cached debuffs
+      if C.nameplates["guessdebuffs"] == "1" then
+        local verify = string.format("%s:%s", (name or ""), (level or ""))
+
+        if unitstr then
+          -- cache all debuffs
+          plate:CacheDebuffs(unitstr)
+          plate.debuffcache.valid = verify
+        elseif plate.debuffcache and plate.debuffcache.valid == verify then
+          -- delete timed out caches
+          for id, data in pairs(plate.debuffcache) do
+            if data.stop and data.stop < GetTime() then
+              table.remove(plate.debuffcache, id)
+            end
+          end
+        elseif plate.debuffcache then
+          -- nameplate changed, invalidating cache
+          for id = 1, 16 do
+            plate.debuffcache[id] = plate.debuffcache[id] or {}
+            plate.debuffcache[id].effect = nil
           end
-        end
-      elseif plate.debuffcache then
-        -- nameplate changed, invalidating cache
-        for id = 1, 16 do
-          plate.debuffcache[id] = plate.debuffcache[id] or {}
-          plate.debuffcache[id].effect = nil
         end
       end