diff --git a/engines/macventure/image.cpp b/engines/macventure/image.cpp
index fa281eb19a0..feb4d2e78bb 100644
--- a/engines/macventure/image.cpp
+++ b/engines/macventure/image.cpp
@@ -386,11 +386,13 @@ bool ImageAsset::isRectInside(Common::Rect rect) {
 	return false;
 }
 
-uint ImageAsset::getWidth() {
+int ImageAsset::getWidth() {
+	if (_imgData.size() == 0) return 0;
 	return MAX(0, (int)_bitWidth);
 }
 
-uint ImageAsset::getHeight() {
+int ImageAsset::getHeight() {
+	if (_imgData.size() == 0) return 0;
 	return MAX(0, (int)_bitHeight);
 }
 
diff --git a/engines/macventure/image.h b/engines/macventure/image.h
index 5cbe1460551..b5291094420 100644
--- a/engines/macventure/image.h
+++ b/engines/macventure/image.h
@@ -55,7 +55,7 @@ struct PPICHuff {
 
 class ImageAsset {
 public:
-	ImageAsset(ObjID original, Container *container); 
+	ImageAsset(ObjID original, Container *container);
 	~ImageAsset();
 
 	void blitInto(Graphics::ManagedSurface *target, uint32 x, uint32 y, BlitMode mode);
@@ -63,8 +63,8 @@ public:
 	bool isPointInside(Common::Point point);
 	bool isRectInside(Common::Rect rect);
 
-	uint getWidth();
-	uint getHeight();
+	int getWidth();
+	int getHeight();
 
 private:
 	void decodePPIC(ObjID id, Common::Array<byte> &data);