diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index b15b9001ca8..e7673d13425 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -1833,6 +1833,9 @@
 					PreprocessorDefinitions="_DEBUG;USE_DL_EXPORT;WIN32;_WINDOWS;$(NoInherit)"/>
 			</FileConfiguration>
 		</File>
+		<File
+			RelativePath="..\Python\pystrtod.c">
+		</File>
 		<File
 			RelativePath="..\PC\python_nt.rc">
 			<FileConfiguration