diff --git a/src/makeBaseExt/top/configure/os/CONFIG_SITE.osf-alpha.osf-alpha b/src/makeBaseExt/top/configure/os/CONFIG_SITE.osf-alpha.osf-alpha
index 2ad6fdcca..89451aa70 100644
--- a/src/makeBaseExt/top/configure/os/CONFIG_SITE.osf-alpha.osf-alpha
+++ b/src/makeBaseExt/top/configure/os/CONFIG_SITE.osf-alpha.osf-alpha
@@ -24,4 +24,5 @@ XRTGRAPH = /usr/local/xrtgraph
 QUESTWIN =
 IDL =
 JAVA_DIR=/usr/local/java
+JAVA_INC=$(JAVA_DIR)/include