diff --git a/scumm/script_v72he.cpp b/scumm/script_v72he.cpp
index 570e34cf333..48a3e0262ba 100644
--- a/scumm/script_v72he.cpp
+++ b/scumm/script_v72he.cpp
@@ -579,7 +579,8 @@ void ScummEngine_v72he::o72_pushDWord() {
 }
 
 void ScummEngine_v72he::o72_addMessageToStack() {
-	addMessageToStack(_scriptPointer, _stringBuffer, 4096);
+	_stringLength = resStrLen(_scriptPointer) + 1;
+	addMessageToStack(_scriptPointer, _stringBuffer, _stringLength);
 
 	debug(0,"o72_addMessageToStack(\"%s\")", _scriptPointer);