diff --git a/source/helpers.pas b/source/helpers.pas
index 1b9270ed..c5a435d1 100644
--- a/source/helpers.pas
+++ b/source/helpers.pas
@@ -2526,7 +2526,7 @@ begin
   rx.Expression := '\bLANGUAGE SQL\b';
   if rx.Exec(CreateCode) then
     Delete(CreateCode, rx.MatchPos[0], rx.MatchLen[0]);
-  rx.Expression := '\bRETURNS\s+(\w+(\([^\)]*\))?)';
+  rx.Expression := '\bRETURNS\s+(\w+(\([^\)]*\))?(\s+UNSIGNED)?)';
   if rx.Exec(CreateCode) then begin
     Returns := rx.Match[1];
     Delete(CreateCode, rx.MatchPos[0], rx.MatchLen[0]);