diff --git a/bts/regen_makefile.sh b/bts/regen_makefile.sh
new file mode 100755
index 0000000..3f11887
--- /dev/null
+++ b/bts/regen_makefile.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+FILES="*.ttcn *.ttcnpp IPA_CodecPort_CtrlFunctDef.cc IPL4asp_PT.cc IPL4asp_discovery.cc TCCConversion.cc
+TCCInterface.cc UD_PT.cc RLCMAC_EncDec.cc Native_FunctionDefs.cc TRXC_CodecPort_CtrlFunctDef.cc"
+
+export CPPFLAGS_TTCN3="-DIPA_EMULATION_RSL"
+
+../regen-makefile.sh BTS_Tests.ttcn $FILES