3 files changed, 17 insertions, 1 deletions
diff --git a/engines/titanic/true_talk/tt_sentence.cpp b/engines/titanic/true_talk/tt_sentence.cpp
index 9558c546c3..7b49df2560 100644
--- a/engines/titanic/true_talk/tt_sentence.cpp
+++ b/engines/titanic/true_talk/tt_sentence.cpp
@@ -97,6 +97,21 @@ TTconcept **TTsentenceSubBase::setConcept(int conceptIndex, TTconcept *src) {
 	return conceptPP;
 }
 
+int TTsentenceSubBase::changeConcept(int mode, TTconcept **conceptPP, int conceptIndex) {
+	TTconcept **newConceptPP = setConcept(conceptIndex, *conceptPP);
+
+	if (mode == 0 || (mode == 1 && !*newConceptPP)) {
+		if (!*conceptPP)
+			return SS_5;
+
+		delete *newConceptPP;
+		*newConceptPP = new TTconcept(**conceptPP);
+		return SS_VALID;
+	} else {
+		return SS_1;
+	}
+}
+
 /*------------------------------------------------------------------------*/
 
 TTsentenceSub *TTsentenceSub::addSibling() {
diff --git a/engines/titanic/true_talk/tt_sentence.h b/engines/titanic/true_talk/tt_sentence.h
index 3a4fd6c685..e995884ec0 100644
--- a/engines/titanic/true_talk/tt_sentence.h
+++ b/engines/titanic/true_talk/tt_sentence.h
@@ -59,6 +59,7 @@ public:
 	bool is24() const { return _field24 == 0; }
 
 	TTconcept **setConcept(int conceptIndex, TTconcept *src);
+	int changeConcept(int mode, TTconcept **conceptPP, int conceptIndex);
 };
 
 class TTsentenceSub : public TTsentenceSubBase {
diff --git a/engines/titanic/true_talk/tt_string.h b/engines/titanic/true_talk/tt_string.h
index 435efa14b6..060a48f5b6 100644
--- a/engines/titanic/true_talk/tt_string.h
+++ b/engines/titanic/true_talk/tt_string.h
@@ -38,7 +38,7 @@ struct TTstringData {
 	TTstringData(const CString &str) : _string(str), _referenceCount(1) {}
 };
 
-enum TTstringStatus { SS_VALID = 0, SS_5 = 5, SS_7 = 7, SS_8 = 8, SS_11 = 11, SS_13 = 13 };
+enum TTstringStatus { SS_VALID = 0, SS_1 = 1, SS_5 = 5, SS_7 = 7, SS_8 = 8, SS_11 = 11, SS_13 = 13 };
 
 class TTstring {
 private: