diff --git a/scumm/script_v72he.cpp b/scumm/script_v72he.cpp
index 0b45ef27b3e..d7c01d8837c 100644
--- a/scumm/script_v72he.cpp
+++ b/scumm/script_v72he.cpp
@@ -1744,7 +1744,7 @@ void ScummEngine_v72he::o72_unknownF0() {
 	int src2 = pop();
 	int src1 = pop();
 
-	size = resStrLen(getStringAddress(src1)) * 2 + 1;
+	size = resStrLen(getStringAddress(src1)) * 2 + 2;
 
 	writeVar(0, 0);
 	defineArray(0, kStringArray, 0, 0, 0, size);