diff --git a/src/osgPlugins/bsp/Q3BSPReader.cpp b/src/osgPlugins/bsp/Q3BSPReader.cpp
index 4fd9628fb..9e90b2abc 100644
--- a/src/osgPlugins/bsp/Q3BSPReader.cpp
+++ b/src/osgPlugins/bsp/Q3BSPReader.cpp
@@ -113,7 +113,10 @@ public:
 class BSP_BIQUADRATIC_PATCH
 {
 public:
-    BSP_BIQUADRATIC_PATCH():m_vertices(32),m_indices(32)
+    BSP_BIQUADRATIC_PATCH():
+        m_tessellation(0),
+        m_vertices(32),
+        m_indices(32)
     {
     }
     ~BSP_BIQUADRATIC_PATCH()