diff --git a/kong/pdk/private/phases.lua b/kong/pdk/private/phases.lua
index d3a2bca57179..03d7fd168787 100644
--- a/kong/pdk/private/phases.lua
+++ b/kong/pdk/private/phases.lua
@@ -76,7 +76,7 @@ local function check_phase(accepted_phases)
       current_phase = PHASES.admin_api
     else
       error(fmt("no phase in ngx.ctx.KONG_PHASE, (need one of %s)",
-                table.concat(get_phases_names(accepted_phases), ", ")))
+                table.concat(get_phases_names(accepted_phases), ", ")), 3)
     end
   end
 
@@ -89,7 +89,7 @@ local function check_phase(accepted_phases)
 
   error(fmt("function cannot be called in %s phase (only in: %s)",
             current_phase_name,
-            table.concat(accepted_phases_names, ", ")))
+            table.concat(accepted_phases_names, ", ")), 3)
 end
 
 
@@ -101,7 +101,7 @@ local function check_not_phase(rejected_phases)
 
   local current_phase = ngx.ctx.KONG_PHASE
   if not current_phase then
-    error("no phase in ngx.ctx.KONG_PHASE")
+    error("no phase in ngx.ctx.KONG_PHASE", 3)
   end
 
   if band(current_phase, rejected_phases) == 0 then
@@ -114,7 +114,7 @@ local function check_not_phase(rejected_phases)
   error(fmt("function cannot be called in %s phase (can be called in any " ..
             "phases except: %s)",
             current_phase_name,
-            table.concat(rejected_phases_names, ", ")))
+            table.concat(rejected_phases_names, ", ")), 3)
 end