diff --git a/msc/regen_makefile.sh b/msc/regen_makefile.sh
index de8f7ab..fc4a29d 100755
--- a/msc/regen_makefile.sh
+++ b/msc/regen_makefile.sh
@@ -2,6 +2,6 @@
 
 FILES="*.ttcn *.ttcnpp SCCP_EncDec.cc  SCTPasp_PT.cc  TCCConversion.cc TCCInterface.cc UD_PT.cc MNCC_EncDec.cc IPL4asp_PT.cc IPL4asp_discovery.cc SDP_EncDec.cc RTP_EncDec.cc IPA_CodecPort_CtrlFunctDef.cc RTP_CodecPort_CtrlFunctDef.cc MGCP_CodecPort_CtrlFunctDef.cc TELNETasp_PT.cc Native_FunctionDefs.cc SMPP_EncDec.cc SMPP_CodecPort_CtrlFunctDef.cc *.c"
 
-export CPPFLAGS_TTCN3="-DIPA_EMULATION_MGCP -DIPA_EMULATION_GSUP -DUSE_MTP3_DISTRIBUTOR"
+export CPPFLAGS_TTCN3="-DIPA_EMULATION_MGCP -DIPA_EMULATION_GSUP -DIPA_EMULATION_SCCP -DUSE_MTP3_DISTRIBUTOR"
 
 ../regen-makefile.sh MSC_Tests.ttcn $FILES