diff --git a/src/common/attributes/attributes.vcproj b/src/common/attributes/attributes.vcproj
index 493da41ae..424f78deb 100644
--- a/src/common/attributes/attributes.vcproj
+++ b/src/common/attributes/attributes.vcproj
@@ -335,9 +335,6 @@
 			<File
 				RelativePath=".\roadsoverride.h">
 			</File>
-			<File
-				RelativePath=".\synonym.h">
-			</File>
 			<File
 				RelativePath=".\targetregion.h">
 			</File>
@@ -411,9 +408,6 @@
 		<File
 			RelativePath=".\reduceproduction.c">
 		</File>
-		<File
-			RelativePath=".\synonym.c">
-		</File>
 		<File
 			RelativePath=".\targetregion.c">
 		</File>