diff --git a/src/AIS/AIS_Dimension.cxx b/src/AIS/AIS_Dimension.cxx
index 23b23ee7de..f06c012bef 100755
--- a/src/AIS/AIS_Dimension.cxx
+++ b/src/AIS/AIS_Dimension.cxx
@@ -80,7 +80,6 @@ IMPLEMENT_STANDARD_RTTIEXT(AIS_Dimension, AIS_InteractiveObject)
 namespace
 {
   // default text strings
-  static const Standard_Utf32Char THE_FILL_CHARACTER ('0');
   static const TCollection_ExtendedString THE_EMPTY_LABEL;
   static const TCollection_AsciiString    THE_UNDEFINED_UNITS;
 
diff --git a/src/NIS/NIS_TriangulatedDrawer.cxx b/src/NIS/NIS_TriangulatedDrawer.cxx
index a69ea24e11..775a693a1b 100644
--- a/src/NIS/NIS_TriangulatedDrawer.cxx
+++ b/src/NIS/NIS_TriangulatedDrawer.cxx
@@ -78,8 +78,6 @@ void NIS_TriangulatedDrawer::Assign (const Handle_NIS_Drawer& theOther)
   }
 }
 
-static const Standard_Integer nObjPerDrawer = 64;
-
 //=======================================================================
 //function : IsEqual
 //purpose  : Comparison of two Drawers (for Map impementation)
diff --git a/src/OpenGl/OpenGl_Clipping.cxx b/src/OpenGl/OpenGl_Clipping.cxx
index 3a3d7c7c72..85888fdb54 100755
--- a/src/OpenGl/OpenGl_Clipping.cxx
+++ b/src/OpenGl/OpenGl_Clipping.cxx
@@ -17,11 +17,6 @@
 #include <OpenGl_GlCore11.hxx>
 #include <OpenGl_Workspace.hxx>
 
-namespace
-{
-  static const GLdouble OpenGl_DefaultPlaneEq[] = {0.0, 0.0, 0.0, 0.0};
-};
-
 // =======================================================================
 // function : OpenGl_ClippingState
 // purpose  :
diff --git a/src/OpenGl/OpenGl_Context.cxx b/src/OpenGl/OpenGl_Context.cxx
index f577e7e5b4..9e2f07417a 100644
--- a/src/OpenGl/OpenGl_Context.cxx
+++ b/src/OpenGl/OpenGl_Context.cxx
@@ -63,7 +63,6 @@ IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Context, Standard_Transient)
 namespace
 {
   static const Handle(OpenGl_Resource) NULL_GL_RESOURCE;
-  static const GLdouble OpenGl_DefaultPlaneEq[] = {0.0, 0.0, 0.0, 0.0};
 };
 
 // =======================================================================