diff --git a/visualc-shared/include/ngspice/config.h b/visualc-shared/include/ngspice/config.h
index ea77830fb..94583402a 100644
--- a/visualc-shared/include/ngspice/config.h
+++ b/visualc-shared/include/ngspice/config.h
@@ -527,6 +527,3 @@
 /* Define as `fork' if `vfork' does not work. */
 #define vfork fork
 
-/* define if shared ngspice is made */
-# define SHARED_MODULE
-
diff --git a/visualc-shared/sharedspice.vcproj b/visualc-shared/sharedspice.vcproj
index 365dd0af7..6772da9f7 100644
--- a/visualc-shared/sharedspice.vcproj
+++ b/visualc-shared/sharedspice.vcproj
@@ -46,7 +46,7 @@
 				UseUnicodeResponseFiles="false"
 				Optimization="0"
 				AdditionalIncludeDirectories=""$(ProjectDir)..\src\maths\poly";"$(ProjectDir)..\src\frontend";"$(ProjectDir)..\src\spicelib\devices";"$(ProjectDir)include";"$(ProjectDir)..\src\include";"$(ProjectDir)..\src\spicelib\parser";"$(ProjectDir).""
-				PreprocessorDefinitions="_CRT_SECURE_NO_DEPRECATE;SIMULATOR"
+				PreprocessorDefinitions="_CRT_SECURE_NO_DEPRECATE;SIMULATOR;SHARED_MODULE"
 				GeneratePreprocessedFile="0"
 				MinimalRebuild="false"
 				ExceptionHandling="0"
@@ -139,7 +139,7 @@
 				FavorSizeOrSpeed="1"
 				WholeProgramOptimization="true"
 				AdditionalIncludeDirectories=""$(ProjectDir)..\src\maths\poly";"$(ProjectDir)..\src\frontend";"$(ProjectDir)..\src\spicelib\devices";"$(ProjectDir)include";"$(ProjectDir)..\src\include";"$(ProjectDir)..\src\spicelib\parser";"$(ProjectDir).""
-				PreprocessorDefinitions="_CRT_SECURE_NO_DEPRECATE;SIMULATOR"
+				PreprocessorDefinitions="_CRT_SECURE_NO_DEPRECATE;SIMULATOR;SHARED_MODULE"
 				MinimalRebuild="false"
 				ExceptionHandling="0"
 				RuntimeLibrary="0"
@@ -231,7 +231,7 @@
 				FavorSizeOrSpeed="1"
 				WholeProgramOptimization="true"
 				AdditionalIncludeDirectories=""$(ProjectDir)..\src\maths\poly";"$(ProjectDir)..\src\frontend";"$(ProjectDir)..\src\spicelib\devices";"$(ProjectDir)include";"$(ProjectDir)..\src\include";"$(ProjectDir)..\src\spicelib\parser";"$(ProjectDir).""
-				PreprocessorDefinitions="_CRT_SECURE_NO_DEPRECATE;SIMULATOR;USE_OMP"
+				PreprocessorDefinitions="_CRT_SECURE_NO_DEPRECATE;SIMULATOR;SHARED_MODULE;USE_OMP"
 				MinimalRebuild="false"
 				ExceptionHandling="0"
 				RuntimeLibrary="0"