diff --git a/src/main/c/Makefile b/src/main/c/Makefile
index d9b5a83..59dda96 100644
--- a/src/main/c/Makefile
+++ b/src/main/c/Makefile
@@ -19,18 +19,18 @@
 LINOBJ=build/fixup.o build/fuserImp.o build/SerialImp.o
 LININCLUDE=-I/usr/lib/jvm/java-7-openjdk-amd64/include/ -I/usr/lib/jvm/java-7-openjdk-i386/include/ -I"./include" -I"./include/target" -I/usr/lib/jvm/java-6-openjdk-amd64/include/ -I/usr/lib/jvm/java-6-openjdk-armhf/include/ -I/usr/lib/jvm/java-6-openjdk-arm/include/ -I/usr/lib/jvm/java-6-openjdk-i386/include/ -I/etc/alternatives/java_sdk/include -I/etc/alternatives/java_sdk/include/linux
 
-CCLIN32=gcc $(LININCLUDE) -O3 -Wall -c -fmessage-length=0 -fPIC -m32 -MMD
-LINKLIN32=g++ -m32 -shared 
+CCLIN32=gcc $(LININCLUDE) -DLIBLOCKDEV -O3 -Wall -c -fmessage-length=0 -fPIC -m32 -MMD
+LINKLIN32=g++ -m32 -shared -llockdev
 
 
-CCLIN64=gcc $(LININCLUDE) -O3 -Wall -c -fmessage-length=0 -fPIC -m64 -MMD
-LINKLIN64=g++ -m64 -shared 
+CCLIN64=gcc $(LININCLUDE) -DLIBLOCKDEV -g -O0 -Wall -c -fmessage-length=0 -fPIC -m64 -MMD
+LINKLIN64=g++ -g -m64 -shared -llockdev
 
-CCLINARM=arm-linux-gnueabi-gcc $(LININCLUDE) -O3 -Wall -c -fmessage-length=0 -fPIC -MMD -MMD -MP
-LINKLINARM=arm-linux-gnueabi-g++ -shared
+CCLINARM=arm-linux-gnueabi-gcc $(LININCLUDE) -DLIBLOCKDEV -O3 -Wall -c -fmessage-length=0 -fPIC -MMD -MMD -MP
+LINKLINARM=arm-linux-gnueabi-g++ -shared -llockdev
 
-CCLINARM_HF=arm-linux-gnueabihf-gcc $(LININCLUDE) -O3 -Wall -c -fmessage-length=0 -fPIC -MMD -MMD -MP
-LINKLINARM_HF=arm-linux-gnueabihf-g++ -shared
+CCLINARM_HF=arm-linux-gnueabihf-gcc $(LININCLUDE) -DLIBLOCKDEV -O3 -Wall -c -fmessage-length=0 -fPIC -MMD -MMD -MP
+LINKLINARM_HF=arm-linux-gnueabihf-g++ -shared -llockdev
 
 CCLINANDROID=/home/opt/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/arm-linux-androideabi/bin/gcc $(LININCLUDE) -O3 -Wall -c -fmessage-length=0 -fPIC -MMD -MMD -MP
 LINKLINANDROID=/home/opt/android-ndk-r5b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/arm-linux-androideabi/bin/g++ -shared