#2879: rename _winreg to winreg.
diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index c2a3b9a..143a178 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -1563,7 +1563,7 @@
 				>
 			</File>
 			<File
-				RelativePath="..\PC\_winreg.c"
+				RelativePath="..\PC\winreg.c"
 				>
 			</File>
 			<File