diff --git a/compiler/pdecl.pas b/compiler/pdecl.pas
index b2f776c848..2cae4ca756 100644
--- a/compiler/pdecl.pas
+++ b/compiler/pdecl.pas
@@ -728,6 +728,7 @@ implementation
          hdef:=nil;
          first:=true;
          had_generic:=false;
+         storetokenpos:=Default(tfileposinfo);
          repeat
            defpos:=current_tokenpos;
            istyperenaming:=false;
diff --git a/compiler/ptype.pas b/compiler/ptype.pas
index 5a39b5c815..319861107b 100644
--- a/compiler/ptype.pas
+++ b/compiler/ptype.pas
@@ -1577,6 +1577,7 @@ implementation
 
             current_genericdef:=nil;
             current_specializedef:=nil;
+            olddef:=nil;
 
             is_func:=(token=_FUNCTION);
             consume(token);
diff --git a/compiler/symdef.pas b/compiler/symdef.pas
index 57d60681d9..e37b26dde3 100644
--- a/compiler/symdef.pas
+++ b/compiler/symdef.pas
@@ -6763,6 +6763,7 @@ implementation
         include(pno,pno_showhidden);
 {$endif EXTDEBUG}
         s:='';
+        rn:='';
         if proctypeoption=potype_operator then
           begin
             for t:=NOTOKEN to last_overloaded do