diff --git a/src/worksp/libmysterx/myspage/myspage.vcproj b/src/worksp/libmysterx/myspage/myspage.vcproj
index 9e7d595151..fd3acf6fd1 100644
--- a/src/worksp/libmysterx/myspage/myspage.vcproj
+++ b/src/worksp/libmysterx/myspage/myspage.vcproj
@@ -63,7 +63,7 @@
 				UsePrecompiledHeader="0"
 				BrowseInformation="1"
 				WarningLevel="4"
-				Detect64BitPortabilityProblems="true"
+				Detect64BitPortabilityProblems="false"
 				DebugInformationFormat="3"
 			/>
 			<Tool
@@ -259,7 +259,7 @@
 				ProgramDataBaseFileName=""
 				WarningLevel="4"
 				SuppressStartupBanner="true"
-				Detect64BitPortabilityProblems="true"
+				Detect64BitPortabilityProblems="false"
 				DebugInformationFormat="0"
 			/>
 			<Tool
diff --git a/src/worksp/libmysterx/myssink/myssink.vcproj b/src/worksp/libmysterx/myssink/myssink.vcproj
index eaca508074..31ed1360de 100644
--- a/src/worksp/libmysterx/myssink/myssink.vcproj
+++ b/src/worksp/libmysterx/myssink/myssink.vcproj
@@ -61,7 +61,7 @@
 				UsePrecompiledHeader="0"
 				BrowseInformation="1"
 				WarningLevel="4"
-				Detect64BitPortabilityProblems="true"
+				Detect64BitPortabilityProblems="false"
 				DebugInformationFormat="3"
 				CompileAs="2"
 			/>
@@ -259,7 +259,7 @@
 				ProgramDataBaseFileName=""
 				WarningLevel="4"
 				SuppressStartupBanner="true"
-				Detect64BitPortabilityProblems="true"
+				Detect64BitPortabilityProblems="false"
 				DebugInformationFormat="0"
 				CompileAs="2"
 			/>