diff --git a/Visual Studio Projects/MicroVAX1.vcproj b/Visual Studio Projects/MicroVAX1.vcproj
index 2e6658e3..b68e58bb 100644
--- a/Visual Studio Projects/MicroVAX1.vcproj	
+++ b/Visual Studio Projects/MicroVAX1.vcproj	
@@ -254,6 +254,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/MicroVAX2.vcproj b/Visual Studio Projects/MicroVAX2.vcproj
index 0ab25580..8d003076 100644
--- a/Visual Studio Projects/MicroVAX2.vcproj	
+++ b/Visual Studio Projects/MicroVAX2.vcproj	
@@ -254,6 +254,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/PDP10.vcproj b/Visual Studio Projects/PDP10.vcproj
index 17863337..431a223a 100644
--- a/Visual Studio Projects/PDP10.vcproj	
+++ b/Visual Studio Projects/PDP10.vcproj	
@@ -282,6 +282,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/PDP11.vcproj b/Visual Studio Projects/PDP11.vcproj
index 3d5f9223..552a69d9 100644
--- a/Visual Studio Projects/PDP11.vcproj	
+++ b/Visual Studio Projects/PDP11.vcproj	
@@ -377,6 +377,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/VAX.vcproj b/Visual Studio Projects/VAX.vcproj
index f06f009b..98a6a52b 100644
--- a/Visual Studio Projects/VAX.vcproj	
+++ b/Visual Studio Projects/VAX.vcproj	
@@ -258,6 +258,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/VAX730.vcproj b/Visual Studio Projects/VAX730.vcproj
index 0192bbdf..11c99731 100644
--- a/Visual Studio Projects/VAX730.vcproj	
+++ b/Visual Studio Projects/VAX730.vcproj	
@@ -273,6 +273,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/VAX750.vcproj b/Visual Studio Projects/VAX750.vcproj
index 3e292e84..7fdb8f9b 100644
--- a/Visual Studio Projects/VAX750.vcproj	
+++ b/Visual Studio Projects/VAX750.vcproj	
@@ -281,6 +281,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/VAX780.vcproj b/Visual Studio Projects/VAX780.vcproj
index 88432bb6..d21b8c50 100644
--- a/Visual Studio Projects/VAX780.vcproj	
+++ b/Visual Studio Projects/VAX780.vcproj	
@@ -285,6 +285,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/VAX8600.vcproj b/Visual Studio Projects/VAX8600.vcproj
index 2e055fae..28bb2e0c 100644
--- a/Visual Studio Projects/VAX8600.vcproj	
+++ b/Visual Studio Projects/VAX8600.vcproj	
@@ -285,6 +285,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>
diff --git a/Visual Studio Projects/rtVAX1000.vcproj b/Visual Studio Projects/rtVAX1000.vcproj
index 2893cb5b..53eb8fd6 100644
--- a/Visual Studio Projects/rtVAX1000.vcproj	
+++ b/Visual Studio Projects/rtVAX1000.vcproj	
@@ -255,6 +255,7 @@
 					>
 					<Tool
 						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
 						PreprocessorDefinitions="HAVE_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
 						CompileAs="1"
 					/>