diff --git a/runtime/syntax/algol68.vim b/runtime/syntax/algol68.vim
index 41b9797c51..9ad46066fe 100644
--- a/runtime/syntax/algol68.vim
+++ b/runtime/syntax/algol68.vim
@@ -3,14 +3,12 @@
 " Version:		0.4
 " Maintainer:		Janis Papanagnou
 " Previous Maintainer:	NevilleD.ALGOL_68@sgr-a.net
-" Last Change:		2026 Jun 13
+" Last Change:		2026 Aug 12
 
 if exists("b:current_syntax")
   finish
 endif
 
-syn sync minlines=250 maxlines=500
-
 " Algol68 Final Report, unrevised
 syn keyword algol68PreProc	PRIORITY
 syn keyword algol68Operator	BTB CTB CONJ QUOTE CT CTAB EITHER SIGN
@@ -487,6 +485,9 @@ if !exists("algol68_no_preludes")
 
 endif
 
+" pragment regions with matching start/end tokens necessitate a full parse
+syn sync fromstart
+
 " Define the default highlighting.
 hi def link algol68Boolean		Boolean
 hi def link algol68Comment		Comment