diff --git a/src/Mod/Draft/App/PreCompiled.h b/src/Mod/Draft/App/PreCompiled.h
index 8c8e0b33cd..0922240f4d 100644
--- a/src/Mod/Draft/App/PreCompiled.h
+++ b/src/Mod/Draft/App/PreCompiled.h
@@ -30,11 +30,9 @@
 #ifdef FC_OS_WIN32
 # define DraftUtilsExport  __declspec(dllexport)
 # define PartExport __declspec(dllexport)
-# define BaseExport  __declspec(dllimport)
 #else // for Linux
 # define DraftUtilsExport
 # define PartExport
-# define BaseExport
 #endif
 
 #ifdef _MSC_VER
diff --git a/src/Mod/Fem/App/PreCompiled.h b/src/Mod/Fem/App/PreCompiled.h
index 089be95ec2..4e4752d380 100644
--- a/src/Mod/Fem/App/PreCompiled.h
+++ b/src/Mod/Fem/App/PreCompiled.h
@@ -32,13 +32,11 @@
 # define FemExport      __declspec(dllexport)
 # define PartExport     __declspec(dllimport)
 # define MeshExport     __declspec(dllimport)
-# define BaseExport     __declspec(dllimport)
 #else // for Linux
 # define AppFemExport
 # define FemExport
 # define PartExport
 # define MeshExport
-# define BaseExport
 #endif
 
 #ifdef _MSC_VER
diff --git a/src/Mod/Path/App/PreCompiled.h b/src/Mod/Path/App/PreCompiled.h
index d5a77f42f2..7a787a15ab 100644
--- a/src/Mod/Path/App/PreCompiled.h
+++ b/src/Mod/Path/App/PreCompiled.h
@@ -31,12 +31,10 @@
 # define PathExport  __declspec(dllexport)
 //# define RobotExport __declspec(dllexport) uncomment this to use KDL
 # define PartExport __declspec(dllimport)
-# define BaseExport  __declspec(dllimport)
 #else // for Linux
 # define PathExport
 //# define RobotExport uncomment this to use KDL
 # define PartExport
-# define BaseExport
 #endif
 
 #ifdef _PreComp_
diff --git a/src/Mod/ReverseEngineering/Gui/PreCompiled.h b/src/Mod/ReverseEngineering/Gui/PreCompiled.h
index 313b942286..fcd2cb3fe1 100644
--- a/src/Mod/ReverseEngineering/Gui/PreCompiled.h
+++ b/src/Mod/ReverseEngineering/Gui/PreCompiled.h
@@ -34,7 +34,6 @@
 # define MeshExport    __declspec(dllimport)
 # define MeshGuiExport __declspec(dllimport)
 # define PointsExport  __declspec(dllimport)
-# define AppExport     __declspec(dllimport)
 #else // for Linux
 # define ReenExport
 # define ReenGuiExport
@@ -42,7 +41,6 @@
 # define MeshExport
 # define MeshGuiExport
 # define PointsExport
-# define AppExport
 #endif
 
 #ifdef _MSC_VER
diff --git a/src/Mod/Robot/App/PreCompiled.h b/src/Mod/Robot/App/PreCompiled.h
index 30daa1dc9e..773769ffc0 100644
--- a/src/Mod/Robot/App/PreCompiled.h
+++ b/src/Mod/Robot/App/PreCompiled.h
@@ -31,12 +31,10 @@
 # define RobotExport __declspec(dllexport)
 # define PartExport  __declspec(dllimport)
 # define MeshExport  __declspec(dllimport)
-# define BaseExport  __declspec(dllimport)
 #else // for Linux
 # define RobotExport
 # define PartExport 
 # define MeshExport  
-# define BaseExport  
 #endif
 
 #ifdef _PreComp_