diff --git a/examples/negativeviewportheight/negativeviewportheight.cpp b/examples/negativeviewportheight/negativeviewportheight.cpp
index 3d6d3bfe..ac047a9b 100644
--- a/examples/negativeviewportheight/negativeviewportheight.cpp
+++ b/examples/negativeviewportheight/negativeviewportheight.cpp
@@ -29,7 +29,7 @@
 class VulkanExample : public VulkanExampleBase
 {
 public:
-	bool negativeViewport;
+	bool negativeViewport = true;
 	int32_t offsety = 0;
 	int32_t offsetx = 0;
 	int32_t windingOrder = 1;