diff --git a/Makefile b/Makefile
index b4dc5a0..7647e8a 100755
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,8 @@
+
+JAVA_HOME ?= /usr/local/j2sdk
+
 CC=gcc
-CFLAGS = -c -DLINUX -fPIC -I/usr/local/j2sdk/include/ -I/usr/local/j2sdk/include/linux -Wimplicit -Wstrict-prototypes -Wall -Wno-unknown-pragmas -Iinclude
+CFLAGS = -c -DLINUX -fPIC -I$(JAVA_HOME)/include/ -I$(JAVA_HOME)/include/linux -Wimplicit -Wstrict-prototypes -Wall -Wno-unknown-pragmas -Iinclude
 BINDIR=/usr/local/bin
 
 OBJFILES=jtux_clock.o jtux_file.o jtux_sysvipc.o jtux_dir.o jtux_network.o jtux_process.o jtux_util.o