diff --git a/VisualizationModules/LibRender/cvfScalarMapperDiscreteLog.cpp b/VisualizationModules/LibRender/cvfScalarMapperDiscreteLog.cpp
index 48e1adb274..564ec95c9c 100644
--- a/VisualizationModules/LibRender/cvfScalarMapperDiscreteLog.cpp
+++ b/VisualizationModules/LibRender/cvfScalarMapperDiscreteLog.cpp
@@ -33,6 +33,9 @@ namespace cvf {
 //==================================================================================================
 
 ScalarMapperDiscreteLog::ScalarMapperDiscreteLog()
+:   m_logRange(0.0),
+    m_logRangeMin(0.0),
+    m_hasNegativeRange(false)
 {
     m_decadeLevelCount = 2; 
 }