diff --git a/src/osg/State.cpp b/src/osg/State.cpp
index 1b924f790..3328929af 100644
--- a/src/osg/State.cpp
+++ b/src/osg/State.cpp
@@ -109,7 +109,7 @@ State::State():
         }
     }
 
-    _abortRenderingPtr = false;    
+    _abortRenderingPtr = NULL;    
 
     _checkGLErrors = ONCE_PER_FRAME;
 
@@ -689,7 +689,7 @@ bool State::getLastAppliedTextureMode(unsigned int unit,StateAttribute::GLMode m
 
 const StateAttribute* State::getLastAppliedTextureAttribute(unsigned int unit,StateAttribute::Type type, unsigned int member) const
 {
-    if (unit>=_textureAttributeMapList.size()) return false;
+    if (unit>=_textureAttributeMapList.size()) return NULL;
     return getLastAppliedAttribute(_textureAttributeMapList[unit],type,member);
 }