diff --git a/examples/common/camera.cpp b/examples/common/camera.cpp
index 122b5f52a..3c154aac1 100644
--- a/examples/common/camera.cpp
+++ b/examples/common/camera.cpp
@@ -159,7 +159,7 @@ struct Camera
 		m_mouseLast.m_mz = m_mouseNow.m_mz;
 		m_mouseNow.m_mz  = _mouseState.m_mz;
 
-		const int32_t deltaZ = float(m_mouseNow.m_mz - m_mouseLast.m_mz);
+		const float deltaZ = float(m_mouseNow.m_mz - m_mouseLast.m_mz);
 
 		if (m_mouseDown)
 		{