diff --git a/assignments/nbproject/project.properties b/assignments/nbproject/project.properties
index 9003d11a34aa62d496dd78e30b32d7bea504d908..dcb4e6516d3748add825766b33efb2dc4c9ad506 100644
--- a/assignments/nbproject/project.properties
+++ b/assignments/nbproject/project.properties
@@ -46,6 +46,7 @@ file.reference.open-dis_4.16.jar=../lib/open-dis_4.16.jar
 file.reference.simkit-doc.zip=../lib/simkit-doc.zip
 file.reference.simkit-src.zip=../lib/simkit-src.zip
 file.reference.simkit.jar=../lib/simkit.jar
+file.reference.viskit-lib=../viskit/lib
 #file.reference.opendis7-enumerations-classes.jar=../lib/opendis7-enumerations-classes.jar
 #file.reference.opendis7-pdus-classes.jar=../lib/opendis7-pdus-classes.jar
 includes=**
@@ -58,7 +59,8 @@ javac.classpath=\
     ${file.reference.open-dis_4.16.jar}:\
     ${file.reference.simkit-doc.zip}:\
     ${file.reference.simkit-src.zip}:\
-    ${file.reference.simkit.jar}
+    ${file.reference.simkit.jar}:\
+    ${file.reference.viskit-lib}
 #   ${file.reference.opendis7-enumerations-classes.jar}:\
 #   ${file.reference.opendis7-pdus-classes.jar}:\