diff --git a/cyassl-ntru.vcproj b/cyassl-ntru.vcproj
index 2402504bb..d337af687 100755
--- a/cyassl-ntru.vcproj
+++ b/cyassl-ntru.vcproj
@@ -182,6 +182,10 @@
 				RelativePath=".\ctaocrypt\src\dsa.c"
 				>
 			</File>
+			<File
+				RelativePath=".\ctaocrypt\src\error.c"
+				>
+			</File>
 			<File
 				RelativePath=".\ctaocrypt\src\hc128.c"
 				>
diff --git a/cyassl.vcproj b/cyassl.vcproj
index d21effda1..b843262bc 100755
--- a/cyassl.vcproj
+++ b/cyassl.vcproj
@@ -178,6 +178,10 @@
 				RelativePath=".\ctaocrypt\src\dsa.c"
 				>
 			</File>
+			<File
+				RelativePath=".\ctaocrypt\src\error.c"
+				>
+			</File>
 			<File
 				RelativePath=".\ctaocrypt\src\hc128.c"
 				>