diff --git a/include/osg/NodeCallback b/include/osg/NodeCallback
index edaedd38c..f3b036f66 100644
--- a/include/osg/NodeCallback
+++ b/include/osg/NodeCallback
@@ -23,7 +23,7 @@ class SG_EXPORT NodeCallback : public Referenced {
             REQUIRES_TRAVERSAL = 0x1,
             REQUIRES_PARENT_PATH = 0x2,
             REQUIRES_ACCUMULATED_MATRIX = 0x4,
-            REQUIRES_ACCUMULATED_INVERSE = 0x8,
+            REQUIRES_ACCUMULATED_INVERSE = 0x8
         };
 
         NodeCallback(const Requirements ncr=NO_REQUIREMENTS):_requirements(ncr) {}
diff --git a/src/osg/DisplaySettings.cpp b/src/osg/DisplaySettings.cpp
index 356870895..98f977cae 100644
--- a/src/osg/DisplaySettings.cpp
+++ b/src/osg/DisplaySettings.cpp
@@ -66,7 +66,7 @@ void DisplaySettings::setDefaults()
 void DisplaySettings::readEnvironmentalVariables()
 {
     char *ptr;
-    if( (ptr = getenv("OSG_STEREO_MODE")) )
+    if( (ptr = getenv("OSG_STEREO_MODE")) != 0)
     {
         if (strcmp(ptr,"QUAD_BUFFER")==0)
         {
@@ -89,7 +89,7 @@ void DisplaySettings::readEnvironmentalVariables()
         }
     }
 
-    if( (ptr = getenv("OSG_STEREO")) )
+    if( (ptr = getenv("OSG_STEREO")) != 0)
     {
         if (strcmp(ptr,"OFF")==0)
         {
@@ -102,17 +102,17 @@ void DisplaySettings::readEnvironmentalVariables()
         }
     }
 
-    if( (ptr = getenv("OSG_EYE_SEPERATION")) )
+    if( (ptr = getenv("OSG_EYE_SEPERATION")) != 0)
     {
         _eyeSeperation = atof(ptr);
     }
 
-    if( (ptr = getenv("OSG_SCREEN_DISTANCE")) )
+    if( (ptr = getenv("OSG_SCREEN_DISTANCE")) != 0)
     {
         _screenDistance = atof(ptr);
     }
 
-    if( (ptr = getenv("OSG_SCREEN_HEIGHT")) )
+    if( (ptr = getenv("OSG_SCREEN_HEIGHT")) != 0)
     {
         _screenHeight = atof(ptr);
     }
diff --git a/src/osg/PolygonMode.cpp b/src/osg/PolygonMode.cpp
index fa77cee5d..0a622bd83 100644
--- a/src/osg/PolygonMode.cpp
+++ b/src/osg/PolygonMode.cpp
@@ -42,10 +42,8 @@ const PolygonMode::Mode PolygonMode::getMode(const Face face) const
     {
         case(FRONT):
             return _modeFront;
-            break;
         case(BACK):
             return _modeBack;
-            break;
         case(FRONT_AND_BACK):
             return _modeFront;
     }