diff --git a/builds/windows/visualc/freetype.vcproj b/builds/windows/visualc/freetype.vcproj
index 4cbb6b9e7..577e53dd6 100644
--- a/builds/windows/visualc/freetype.vcproj
+++ b/builds/windows/visualc/freetype.vcproj
@@ -434,6 +434,10 @@
 					/>
 				</FileConfiguration>
 			</File>
+			<File
+				RelativePath="..\..\..\src\sdf\sdf.c"
+				>
+			</File>
 			<File
 				RelativePath="..\..\..\src\smooth\smooth.c"
 				>