diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index 4a733ef0dda..7eeb787454c 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -153,6 +153,9 @@
 	<References>
 	</References>
 	<Files>
+		<File
+			RelativePath="..\Modules\_bisectmodule.c">
+		</File>
 		<File
 			RelativePath="..\Modules\_codecsmodule.c">
 			<FileConfiguration