diff --git a/editor/editor_vs2008.vcproj b/editor/editor_vs2008.vcproj
index 0249820..8262fe2 100644
--- a/editor/editor_vs2008.vcproj
+++ b/editor/editor_vs2008.vcproj
@@ -47,7 +47,6 @@
 				RuntimeLibrary="1"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
-				Detect64BitPortabilityProblems="true"
 				DebugInformationFormat="4"
 			/>
 			<Tool
@@ -123,7 +122,6 @@
 				BufferSecurityCheck="false"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
-				Detect64BitPortabilityProblems="true"
 				DebugInformationFormat="3"
 			/>
 			<Tool
diff --git a/sync_player_vs2008.vcproj b/sync_player_vs2008.vcproj
index 29de378..681b43d 100644
--- a/sync_player_vs2008.vcproj
+++ b/sync_player_vs2008.vcproj
@@ -169,7 +169,6 @@
 				RuntimeLibrary="1"
 				UsePrecompiledHeader="0"
 				WarningLevel="3"
-				Detect64BitPortabilityProblems="true"
 				DebugInformationFormat="4"
 			/>
 			<Tool