3 files changed, 15 insertions, 0 deletions
diff --git a/engines/toltecs/screen.cpp b/engines/toltecs/screen.cpp
index 2f16c29ab2..be91130c0a 100644
--- a/engines/toltecs/screen.cpp
+++ b/engines/toltecs/screen.cpp
@@ -481,6 +481,15 @@ void Screen::addTalkTextItemsToRenderQueue() {
 	}
 }
 
+bool Screen::isTalkTextActive(int16 slotIndex) {
+	for (int16 i = 0; i <= _talkTextItemNum; i++) {
+		if (_talkTextItems[i].slotIndex == slotIndex && _talkTextItems[i].duration > 0)
+			return true;
+	}
+
+	return false;
+}
+
 int16 Screen::getTalkTextDuration() {
 	return _talkTextItems[_talkTextItemNum].duration;
 }
diff --git a/engines/toltecs/screen.h b/engines/toltecs/screen.h
index f4ecd2ca62..ee565e1882 100644
--- a/engines/toltecs/screen.h
+++ b/engines/toltecs/screen.h
@@ -182,6 +182,7 @@ public:
 	void addTalkTextRect(Font &font, int16 x, int16 &y, int16 length, int16 width, TalkTextItem *item);
 	void addTalkTextItemsToRenderQueue();
 	int16 getTalkTextDuration();
+	bool isTalkTextActive(int16 slotIndex);
 	void finishTalkTextItems();
 	void keepTalkTextItemsAlive();
 
diff --git a/engines/toltecs/toltecs.cpp b/engines/toltecs/toltecs.cpp
index 02a0e338a0..1a399dacc0 100644
--- a/engines/toltecs/toltecs.cpp
+++ b/engines/toltecs/toltecs.cpp
@@ -495,6 +495,11 @@ void ToltecsEngine::updateCamera() {
 void ToltecsEngine::talk(int16 slotIndex, int16 slotOffset) {
 	byte *scanData = _script->getSlotData(slotIndex) + slotOffset;
 
+	// If there's another talk text at the requested slot and it's still
+	// active, don't overwrite it. Fixes bug #3600166.
+	if (_screen->isTalkTextActive(slotIndex))
+		return;
+
 	while (*scanData < 0xF0) {
 		if (*scanData == 0x19) {
 			scanData++;