diff --git a/aegisub/build/libaegisub_vs2008/compiler_options_debug.vsprops b/aegisub/build/libaegisub_vs2008/compiler_options_debug.vsprops
index 6ecc345df..534c53486 100644
--- a/aegisub/build/libaegisub_vs2008/compiler_options_debug.vsprops
+++ b/aegisub/build/libaegisub_vs2008/compiler_options_debug.vsprops
@@ -16,7 +16,6 @@
 		BufferSecurityCheck="true"
 		EnableFunctionLevelLinking="true"
 		DebugInformationFormat="4"
-		EnablePREfast="true"
 	/>
 	<Tool
 		Name="VCLinkerTool"