diff --git a/engines/lastexpress/data/background.cpp b/engines/lastexpress/data/background.cpp
index 3d866c26f91..60379251a3f 100644
--- a/engines/lastexpress/data/background.cpp
+++ b/engines/lastexpress/data/background.cpp
@@ -107,6 +107,7 @@ byte *Background::decodeComponent(Common::SeekableReadStream *in, uint32 inSize,
 		return NULL;
 
 	// Initialize the decoding
+	memset(out, 0, outSize * sizeof(byte));
 	uint32 inPos = 0;
 	uint32 outPos = 0;
 
diff --git a/engines/lastexpress/debug.cpp b/engines/lastexpress/debug.cpp
index f89ad8b80d6..55fb469da37 100644
--- a/engines/lastexpress/debug.cpp
+++ b/engines/lastexpress/debug.cpp
@@ -139,6 +139,9 @@ void Debugger::copyCommand(int argc, const char **argv) {
 
 	for (int i = 0; i < _numParams; i++) {
 		_commandParams[i] = (char *)malloc(strlen(argv[i]) + 1);
+		if (_commandParams[i] == NULL)
+			error("[Debugger::copyCommand] Cannot allocate memory for command parameters");
+
 		memset(_commandParams[i], 0, strlen(argv[i]) + 1);
 		strcpy(_commandParams[i], argv[i]);
 	}
diff --git a/engines/lastexpress/sound/queue.cpp b/engines/lastexpress/sound/queue.cpp
index d72acfd8a01..8904b489305 100644
--- a/engines/lastexpress/sound/queue.cpp
+++ b/engines/lastexpress/sound/queue.cpp
@@ -67,6 +67,8 @@ void SoundQueue::handleTimer() {
 
 	for (Common::List<SoundEntry *>::iterator i = _soundList.begin(); i != _soundList.end(); ++i) {
 		SoundEntry *entry = (*i);
+		if (entry == NULL)
+			error("[SoundQueue::handleTimer] Invalid entry found in sound queue");
 
 		// When the entry has stopped playing, we remove his buffer
 		if (entry->isFinished()) {
@@ -123,6 +125,8 @@ void SoundQueue::updateQueue() {
 
 	for (Common::List<SoundEntry *>::iterator it = _soundList.begin(); it != _soundList.end(); ++it) {
 		SoundEntry *entry = *it;
+		if (entry == NULL)
+			error("[SoundQueue::updateQueue] Invalid entry found in sound queue");
 
 		// Original removes the entry data from the cache and sets the archive as not loaded
 		// and if the sound data buffer is not full, loads a new entry to be played based on
@@ -179,6 +183,8 @@ void SoundQueue::clearQueue() {
 
 	for (Common::List<SoundEntry *>::iterator i = _soundList.begin(); i != _soundList.end(); ++i) {
 		SoundEntry *entry = (*i);
+		if (entry == NULL)
+			error("[SoundQueue::clearQueue] Invalid entry found in sound queue");
 
 		// Delete entry
 		entry->close();