diff --git a/Visual Studio Projects/PDP11.vcproj b/Visual Studio Projects/PDP11.vcproj
index d3425faf..bf3e3678 100644
--- a/Visual Studio Projects/PDP11.vcproj	
+++ b/Visual Studio Projects/PDP11.vcproj	
@@ -347,7 +347,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
-						PreprocessorDefinitions="HAVE_PTW32_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
+						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 					/>
 				</FileConfiguration>
 				<FileConfiguration
@@ -355,7 +355,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
-						PreprocessorDefinitions="HAVE_PTW32_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
+						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 					/>
 				</FileConfiguration>
 			</File>
diff --git a/Visual Studio Projects/VAX.vcproj b/Visual Studio Projects/VAX.vcproj
index 77776838..65a1b795 100644
--- a/Visual Studio Projects/VAX.vcproj	
+++ b/Visual Studio Projects/VAX.vcproj	
@@ -255,7 +255,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
-						PreprocessorDefinitions="HAVE_PTW32_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
+						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 					/>
 				</FileConfiguration>
 				<FileConfiguration
@@ -264,7 +264,7 @@
 					<Tool
 						Name="VCCLCompilerTool"
 						WholeProgramOptimization="false"
-						PreprocessorDefinitions="HAVE_PTW32_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
+						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 					/>
 				</FileConfiguration>
 			</File>
diff --git a/Visual Studio Projects/VAX780.vcproj b/Visual Studio Projects/VAX780.vcproj
index fbbaaf5c..5c41a4b0 100644
--- a/Visual Studio Projects/VAX780.vcproj	
+++ b/Visual Studio Projects/VAX780.vcproj	
@@ -265,7 +265,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
-						PreprocessorDefinitions="HAVE_PTW32_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
+						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 					/>
 				</FileConfiguration>
 				<FileConfiguration
@@ -274,7 +274,7 @@
 					<Tool
 						Name="VCCLCompilerTool"
 						WholeProgramOptimization="false"
-						PreprocessorDefinitions="HAVE_PTW32_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
+						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 					/>
 				</FileConfiguration>
 			</File>