diff --git a/engines/private/private.cpp b/engines/private/private.cpp
index 095c504b64e..5a2447fdceb 100644
--- a/engines/private/private.cpp
+++ b/engines/private/private.cpp
@@ -47,7 +47,9 @@ PrivateEngine *g_private = NULL;
 extern int parse(char *);
 
 PrivateEngine::PrivateEngine(OSystem *syst, const ADGameDescription *gd)
-	: Engine(syst), _gameDescription(gd) {
+	: Engine(syst), _gameDescription(gd), _image(nullptr), _videoDecoder(nullptr),
+	  _compositeSurface(nullptr), _transparentColor(0), _frame(nullptr),
+	  _maxNumberClicks(0), _sirenWarning(0), _screenW(0), _screenH(0) {
 	_rnd = new Common::RandomSource("private");
 
 	// Debug channels
diff --git a/engines/private/symbol.cpp b/engines/private/symbol.cpp
index b25564251d3..fb9da2f4c6f 100644
--- a/engines/private/symbol.cpp
+++ b/engines/private/symbol.cpp
@@ -75,7 +75,7 @@ void setSymbol(Symbol *s, int v) {
 }
 
 /* find s in symbol table symlist */
-static Symbol *lookup(const Common::String &s, SymbolMap symlist) {
+static Symbol *lookup(const Common::String &s, const SymbolMap &symlist) {
 	Symbol *r = symlist.getVal(s);
 	return r;
 }