diff --git a/ggsn_tests/regen_makefile.sh b/ggsn_tests/regen_makefile.sh
index 6afd5d9..5e6b08d 100755
--- a/ggsn_tests/regen_makefile.sh
+++ b/ggsn_tests/regen_makefile.sh
@@ -1,5 +1,24 @@
 #!/bin/sh
 
-FILES="*.ttcn IPL4asp_PT.cc  IPL4asp_discovery.cc  TCCConversion.cc  TCCInterface.cc GTPC_EncDec.cc GTPU_EncDec.cc GTP_CodecPort_CtrlFunctDef.cc ICMPv6_EncDec.cc IP_EncDec.cc Native_FunctionDefs.cc UDP_EncDec.cc ICMP_EncDec.cc TELNETasp_PT.cc BSSGP_EncDec.cc"
+FILES="
+	*.ttcn
+	BSSGP_EncDec.cc
+	GTPC_EncDec.cc
+	GTPU_EncDec.cc
+	GTP_CodecPort_CtrlFunctDef.cc
+	ICMP_EncDec.cc
+	ICMPv6_EncDec.cc
+	IPL4asp_PT.cc
+	IPL4asp_discovery.cc
+	IP_EncDec.cc
+	Native_FunctionDefs.cc
+	TCCConversion.cc
+	TCCInterface.cc
+	TELNETasp_PT.cc
+	UDP_EncDec.cc
+"
+
+export CPPFLAGS_TTCN3="
+"
 
 ../regen-makefile.sh GGSN_Tests.ttcn $FILES