diff --git a/bsc-nat/regen_makefile.sh b/bsc-nat/regen_makefile.sh
index ad31551..33b557c 100755
--- a/bsc-nat/regen_makefile.sh
+++ b/bsc-nat/regen_makefile.sh
@@ -2,8 +2,31 @@
 
 MAIN=BSCNAT_Tests.ttcn
 
-FILES="*.ttcn *.ttcnpp SCCP_EncDec.cc IPA_CodecPort_CtrlFunctDef.cc IPL4asp_PT.cc IPL4asp_discovery.cc TCCConversion.cc TCCInterface.cc RTP_EncDec.cc SDP_EncDec.cc *.c MGCP_CodecPort_CtrlFunctDef.cc TELNETasp_PT.cc Native_FunctionDefs.cc"
+FILES="
+	*.c
+	*.ttcn
+	*.ttcnpp
+	IPA_CodecPort_CtrlFunctDef.cc
+	IPL4asp_PT.cc
+	IPL4asp_discovery.cc
+	MGCP_CodecPort_CtrlFunctDef.cc
+	Native_FunctionDefs.cc
+	RTP_EncDec.cc
+	SCCP_EncDec.cc
+	SDP_EncDec.cc
+	TCCConversion.cc
+	TCCInterface.cc
+	TELNETasp_PT.cc
+"
 
-export CPPFLAGS_TTCN3="-DIPA_EMULATION_SCCP -DIPA_EMULATION_MGCP -DIPA_EMULATION_CTRL -DRAN_EMULATION_BSSAP -DRAN_EMULATION_MGCP -DRAN_EMULATION_CTRL -DUSE_MTP3_DISTRIBUTOR"
+export CPPFLAGS_TTCN3="
+	-DIPA_EMULATION_CTRL
+	-DIPA_EMULATION_MGCP
+	-DIPA_EMULATION_SCCP
+	-DRAN_EMULATION_BSSAP
+	-DRAN_EMULATION_CTRL
+	-DRAN_EMULATION_MGCP
+	-DUSE_MTP3_DISTRIBUTOR
+"
 
 ../regen-makefile.sh $MAIN $FILES