diff --git a/engines/cge2/detection.cpp b/engines/cge2/detection.cpp
index 8ed992917cb..b7ca5dcea85 100644
--- a/engines/cge2/detection.cpp
+++ b/engines/cge2/detection.cpp
@@ -43,7 +43,7 @@ namespace CGE2 {
 
 static const PlainGameDescriptor CGE2Games[] = {
 		{ "sfinx", "Sfinx" },
-		{ 0, 0 }
+		{ nullptr, nullptr }
 };
 
 static const ADGameDescription gameDescriptions[] = {
@@ -162,7 +162,7 @@ public:
 static ADGameDescription s_fallbackDesc = {
 	"sfinx",
 	"Unknown version",
-	AD_ENTRY1(0, 0), // This should always be AD_ENTRY1(0, 0) in the fallback descriptor
+	AD_ENTRY1(nullptr, nullptr), // This should always be AD_ENTRY1(0, 0) in the fallback descriptor
 	Common::UNK_LANG,
 	Common::kPlatformDOS,
 	ADGF_NO_FLAGS,
@@ -170,8 +170,8 @@ static ADGameDescription s_fallbackDesc = {
 };
 
 static const ADFileBasedFallback fileBasedFallback[] = {
-	{ &s_fallbackDesc, { "vol.cat", "vol.dat", 0 } },
-	{ 0, { 0 } }
+	{ &s_fallbackDesc, { "vol.cat", "vol.dat", nullptr } },
+	{ nullptr, { nullptr } }
 };
 
 // This fallback detection looks identical to the one used for CGE. In fact, the difference resides
diff --git a/engines/cge2/events.cpp b/engines/cge2/events.cpp
index bd01965f4a2..574236f6181 100644
--- a/engines/cge2/events.cpp
+++ b/engines/cge2/events.cpp
@@ -56,7 +56,7 @@ bool Keyboard::getKey(Common::Event &event) {
 			return false;
 		// Display ScummVM version and translation strings
 		for (int i = 0; i < 3; i++)
-			_vm->_commandHandler->addCommand(kCmdInf, 1, kShowScummVMVersion + i, NULL);
+			_vm->_commandHandler->addCommand(kCmdInf, 1, kShowScummVMVersion + i, nullptr);
 		return false;
 	case Common::KEYCODE_F5:
 		_vm->saveGameDialog();
diff --git a/engines/cge2/sound.cpp b/engines/cge2/sound.cpp
index 90903081dac..7cc54d20e0a 100644
--- a/engines/cge2/sound.cpp
+++ b/engines/cge2/sound.cpp
@@ -170,7 +170,7 @@ DataCk *Fx::loadWave(EncryptedStream *file) {
 	byte *data = (byte *)malloc(file->size());
 
 	if (!data)
-		return 0;
+		return nullptr;
 
 	file->read(data, file->size());